diff --git a/backend/package-lock.json b/backend/package-lock.json
index e0381d0..254358c 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -10,13 +10,19 @@
       "license": "ISC",
       "dependencies": {
         "@prisma/client": "^6.2.1",
+        "bcrypt": "^5.1.1",
         "cors": "^2.8.5",
+        "dotenv": "^16.4.7",
         "express": "^4.21.2",
+        "jsonwebtoken": "^9.0.2",
         "zod": "^3.24.1"
       },
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+        "@types/bcrypt": "^5.0.2",
         "@types/cors": "^2.8.17",
+        "@types/dotenv": "^6.1.1",
         "@types/express": "^5.0.0",
+        "@types/jsonwebtoken": "^9.0.7",
         "prisma": "^6.2.1",
         "ts-node-dev": "^2.0.0",
         "typescript": "^5.7.3"
@@ -63,6 +69,42 @@
         "@jridgewell/sourcemap-codec": "^1.4.10"
       }
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+    "node_modules/@mapbox/node-pre-gyp": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@mapbox/node-pre-gyp/-/node-pre-gyp-1.0.11.tgz",
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+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "detect-libc": "^2.0.0",
+        "https-proxy-agent": "^5.0.0",
+        "make-dir": "^3.1.0",
+        "node-fetch": "^2.6.7",
+        "nopt": "^5.0.0",
+        "npmlog": "^5.0.1",
+        "rimraf": "^3.0.2",
+        "semver": "^7.3.5",
+        "tar": "^6.1.11"
+      },
+      "bin": {
+        "node-pre-gyp": "bin/node-pre-gyp"
+      }
+    },
+    "node_modules/@mapbox/node-pre-gyp/node_modules/rimraf": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
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+      "deprecated": "Rimraf versions prior to v4 are no longer supported",
+      "license": "ISC",
+      "dependencies": {
+        "glob": "^7.1.3"
+      },
+      "bin": {
+        "rimraf": "bin.js"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
     "node_modules/@prisma/client": {
       "version": "6.2.1",
       "resolved": "https://registry.npmjs.org/@prisma/client/-/client-6.2.1.tgz",
@@ -159,6 +201,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/bcrypt": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@types/bcrypt/-/bcrypt-5.0.2.tgz",
+      "integrity": "sha512-6atioO8Y75fNcbmj0G7UjI9lXN2pQ/IGJ2FWT4a/btd0Lk9lQalHLKhkgKVZ3r+spnmWUKfbMi1GEe9wyHQfNQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/body-parser": {
       "version": "1.19.5",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.5.tgz",
@@ -190,6 +242,16 @@
         "@types/node": "*"
       }
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+    "node_modules/@types/dotenv": {
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/@types/dotenv/-/dotenv-6.1.1.tgz",
+      "integrity": "sha512-ftQl3DtBvqHl9L16tpqqzA4YzCSXZfi7g8cQceTz5rOlYtk/IZbFjAv3mLOQlNIgOaylCQWQoBdDQHPgEBJPHg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/express": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/@types/express/-/express-5.0.0.tgz",
@@ -223,6 +285,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/jsonwebtoken": {
+      "version": "9.0.7",
+      "resolved": "https://registry.npmjs.org/@types/jsonwebtoken/-/jsonwebtoken-9.0.7.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
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       "resolved": "https://registry.npmjs.org/@types/mime/-/mime-1.3.5.tgz",
@@ -291,6 +363,12 @@
       "dev": true,
       "license": "MIT"
     },
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+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
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+      "license": "ISC"
+    },
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@@ -330,6 +408,50 @@
         "node": ">=0.4.0"
       }
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+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "debug": "4"
+      },
+      "engines": {
+        "node": ">= 6.0.0"
+      }
+    },
+    "node_modules/agent-base/node_modules/debug": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.0.tgz",
+      "integrity": "sha512-6WTZ/IxCY/T6BALoZHaE4ctp9xm+Z5kY/pzYaCHRFeyVhojxlrm+46y68HA6hr0TcwEssoxNiDEUJQjfPZ/RYA==",
+      "license": "MIT",
+      "dependencies": {
+        "ms": "^2.1.3"
+      },
+      "engines": {
+        "node": ">=6.0"
+      },
+      "peerDependenciesMeta": {
+        "supports-color": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/agent-base/node_modules/ms": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+      "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
+      "license": "MIT"
+    },
+    "node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
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     "node_modules/anymatch": {
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@@ -344,6 +466,26 @@
         "node": ">= 8"
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/aproba/-/aproba-2.0.0.tgz",
+      "integrity": "sha512-lYe4Gx7QT+MKGbDsA+Z+he/Wtef0BiwDOlK/XkBrdfsh9J/jPPXbX0tE9x9cl27Tmu5gg3QUbUrQYa/y+KOHPQ==",
+      "license": "ISC"
+    },
+    "node_modules/are-we-there-yet": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-2.0.0.tgz",
+      "integrity": "sha512-Ci/qENmwHnsYo9xKIcUJN5LeDKdJ6R1Z1j9V/J5wyq8nh/mYPEpIKJbBZXtZjG04HiK7zV/p6Vs9952MrMeUIw==",
+      "deprecated": "This package is no longer supported.",
+      "license": "ISC",
+      "dependencies": {
+        "delegates": "^1.0.0",
+        "readable-stream": "^3.6.0"
+      },
+      "engines": {
+        "node": ">=10"
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       "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
@@ -361,9 +503,22 @@
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-      "dev": true,
       "license": "MIT"
     },
+    "node_modules/bcrypt": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/bcrypt/-/bcrypt-5.1.1.tgz",
+      "integrity": "sha512-AGBHOG5hPYZ5Xl9KXzU5iKq9516yEmvCKDg3ecP5kX2aB6UqTeXZxk2ELnDgDm6BQSMlLt9rDB4LoSMx0rYwww==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "dependencies": {
+        "@mapbox/node-pre-gyp": "^1.0.11",
+        "node-addon-api": "^5.0.0"
+      },
+      "engines": {
+        "node": ">= 10.0.0"
+      }
+    },
     "node_modules/binary-extensions": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
@@ -405,7 +560,6 @@
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-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "balanced-match": "^1.0.0",
@@ -425,6 +579,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/buffer-equal-constant-time": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
+      "integrity": "sha512-zRpUiDwd/xk6ADqPMATG8vc9VPrkck7T07OIx0gnjmJAnHnTVXNQG3vfvWNuiZIkwu9KrKdA1iJKfsfTVxE6NA==",
+      "license": "BSD-3-Clause"
+    },
     "node_modules/buffer-from": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
@@ -495,13 +655,36 @@
         "fsevents": "~2.3.2"
       }
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+    "node_modules/chownr": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-2.0.0.tgz",
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+      "license": "ISC",
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/color-support": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-support/-/color-support-1.1.3.tgz",
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+      "license": "ISC",
+      "bin": {
+        "color-support": "bin.js"
+      }
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
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-      "dev": true,
       "license": "MIT"
     },
+    "node_modules/console-control-strings": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
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+      "license": "ISC"
+    },
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@@ -567,6 +750,12 @@
         "ms": "2.0.0"
       }
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+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
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+      "license": "MIT"
+    },
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@@ -586,6 +775,15 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
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+    "node_modules/detect-libc": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.0.3.tgz",
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+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=8"
+      }
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       "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
@@ -596,6 +794,18 @@
         "node": ">=0.3.1"
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+    "node_modules/dotenv": {
+      "version": "16.4.7",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.7.tgz",
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+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
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@@ -620,12 +830,27 @@
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+      "resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
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+      "license": "Apache-2.0",
+      "dependencies": {
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+      }
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       "license": "MIT"
     },
+    "node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
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+      "license": "MIT"
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@@ -775,11 +1000,34 @@
         "node": ">= 0.6"
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+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-2.1.0.tgz",
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+      "license": "ISC",
+      "dependencies": {
+        "minipass": "^3.0.0"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/fs-minipass/node_modules/minipass": {
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/minipass/-/minipass-3.3.6.tgz",
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+      "license": "ISC",
+      "dependencies": {
+        "yallist": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
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-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=0.10.0"
@@ -1328,6 +1845,20 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/readable-stream": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+      "license": "MIT",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/readdirp": {
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
@@ -1402,6 +1933,18 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
       "license": "MIT"
     },
+    "node_modules/semver": {
+      "version": "7.6.3",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.3.tgz",
+      "integrity": "sha512-oVekP1cKtI+CTDvHWYFUcMtsK/00wmAEfyqKfNdARm8u1wNVhSgaX7A8d4UuIlUI5e84iEwOhs7ZPYRmzU9U6A==",
+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/send": {
       "version": "0.19.0",
       "resolved": "https://registry.npmjs.org/send/-/send-0.19.0.tgz",
@@ -1456,6 +1999,12 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+      "license": "ISC"
+    },
     "node_modules/setprototypeof": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
@@ -1534,6 +2083,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/signal-exit": {
+      "version": "3.0.7",
+      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
+      "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
+      "license": "ISC"
+    },
     "node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -1564,6 +2119,41 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "license": "MIT",
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
+    "node_modules/string-width": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
+      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "license": "MIT",
+      "dependencies": {
+        "emoji-regex": "^8.0.0",
+        "is-fullwidth-code-point": "^3.0.0",
+        "strip-ansi": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/strip-bom": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
@@ -1597,6 +2187,23 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/tar": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-6.2.1.tgz",
+      "integrity": "sha512-DZ4yORTwrbTj/7MZYq2w+/ZFdI6OZ/f9SFHR+71gIVUZhOQPHzVCLpvRnPgyaMpfWxxk/4ONva3GQSyNIKRv6A==",
+      "license": "ISC",
+      "dependencies": {
+        "chownr": "^2.0.0",
+        "fs-minipass": "^2.0.0",
+        "minipass": "^5.0.0",
+        "minizlib": "^2.1.1",
+        "mkdirp": "^1.0.3",
+        "yallist": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -1619,6 +2226,12 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
+      "license": "MIT"
+    },
     "node_modules/tree-kill": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/tree-kill/-/tree-kill-1.2.2.tgz",
@@ -1764,6 +2377,12 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
+      "license": "MIT"
+    },
     "node_modules/utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
@@ -1789,11 +2408,35 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "license": "BSD-2-Clause"
+    },
+    "node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "license": "MIT",
+      "dependencies": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
+    "node_modules/wide-align": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz",
+      "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==",
+      "license": "ISC",
+      "dependencies": {
+        "string-width": "^1.0.2 || 2 || 3 || 4"
+      }
+    },
     "node_modules/wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "dev": true,
       "license": "ISC"
     },
     "node_modules/xtend": {
@@ -1806,6 +2449,12 @@
         "node": ">=0.4"
       }
     },
+    "node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+      "license": "ISC"
+    },
     "node_modules/yn": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
diff --git a/backend/package.json b/backend/package.json
index df1db86..9a3521a 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -13,16 +13,22 @@
   "license": "ISC",
   "description": "",
   "devDependencies": {
+    "@types/bcrypt": "^5.0.2",
     "@types/cors": "^2.8.17",
+    "@types/dotenv": "^6.1.1",
     "@types/express": "^5.0.0",
+    "@types/jsonwebtoken": "^9.0.7",
     "prisma": "^6.2.1",
     "ts-node-dev": "^2.0.0",
     "typescript": "^5.7.3"
   },
   "dependencies": {
     "@prisma/client": "^6.2.1",
+    "bcrypt": "^5.1.1",
     "cors": "^2.8.5",
+    "dotenv": "^16.4.7",
     "express": "^4.21.2",
+    "jsonwebtoken": "^9.0.2",
     "zod": "^3.24.1"
   }
 }
diff --git a/backend/prisma/migrations/20250114114806_init/migration.sql b/backend/prisma/migrations/20250114114806_init/migration.sql
new file mode 100644
index 0000000..ca60802
--- /dev/null
+++ b/backend/prisma/migrations/20250114114806_init/migration.sql
@@ -0,0 +1,23 @@
+-- CreateTable
+CREATE TABLE "User" (
+    "id" SERIAL NOT NULL,
+    "email" TEXT NOT NULL,
+    "name" TEXT,
+
+    CONSTRAINT "User_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Post" (
+    "id" SERIAL NOT NULL,
+    "title" VARCHAR(255) NOT NULL,
+    "authorId" INTEGER NOT NULL,
+
+    CONSTRAINT "Post_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "User_email_key" ON "User"("email");
+
+-- AddForeignKey
+ALTER TABLE "Post" ADD CONSTRAINT "Post_authorId_fkey" FOREIGN KEY ("authorId") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
diff --git a/backend/prisma/migrations/20250114140956_added_job_title/migration.sql b/backend/prisma/migrations/20250114140956_added_job_title/migration.sql
new file mode 100644
index 0000000..7cfae6b
--- /dev/null
+++ b/backend/prisma/migrations/20250114140956_added_job_title/migration.sql
@@ -0,0 +1,10 @@
+/*
+  Warnings:
+
+  - Added the required column `password` to the `User` table without a default value. This is not possible if the table is not empty.
+  - Made the column `name` on table `User` required. This step will fail if there are existing NULL values in that column.
+
+*/
+-- AlterTable
+ALTER TABLE "User" ADD COLUMN     "password" TEXT NOT NULL,
+ALTER COLUMN "name" SET NOT NULL;
diff --git a/backend/prisma/migrations/20250114145616_added_body_post/migration.sql b/backend/prisma/migrations/20250114145616_added_body_post/migration.sql
new file mode 100644
index 0000000..93dd0c9
--- /dev/null
+++ b/backend/prisma/migrations/20250114145616_added_body_post/migration.sql
@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - Added the required column `body` to the `Post` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- AlterTable
+ALTER TABLE "Post" ADD COLUMN     "body" TEXT NOT NULL;
diff --git a/backend/prisma/migrations/migration_lock.toml b/backend/prisma/migrations/migration_lock.toml
new file mode 100644
index 0000000..648c57f
--- /dev/null
+++ b/backend/prisma/migrations/migration_lock.toml
@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"
\ No newline at end of file
diff --git a/backend/prisma/schema.prisma b/backend/prisma/schema.prisma
index 33d7196..d37b9d1 100644
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -13,4 +13,18 @@ datasource db {
   url      = env("DATABASE_URL")
 }
 
+model User{
+  id Int @id @default(autoincrement())
+  email String @unique
+  name String
+  password String
+  posts Post[]
+}
 
+model Post{
+  id Int @id @default(autoincrement())
+  title String @db.VarChar(255)
+  body String 
+  authorId Int
+  author User @relation(fields: [authorId], references: [id])
+}
\ No newline at end of file
diff --git a/backend/src/app.ts b/backend/src/app.ts
new file mode 100644
index 0000000..812be73
--- /dev/null
+++ b/backend/src/app.ts
@@ -0,0 +1,14 @@
+import express, { Application } from "express";
+import postRoutes from "./routes/postRoutes";
+import userRoutes from "./routes/userRoutes";
+
+const app: Application = express();
+
+// Middleware
+app.use(express.json());
+
+// Routes
+app.use("/posts", postRoutes);
+app.use("/users", userRoutes);
+
+export default app;
diff --git a/backend/src/controllers/postControllers.ts b/backend/src/controllers/postControllers.ts
new file mode 100644
index 0000000..afc29e8
--- /dev/null
+++ b/backend/src/controllers/postControllers.ts
@@ -0,0 +1,52 @@
+import { Request, Response} from "express";
+import { createPost,getPostById,getAllPosts } from "../models/postModel";
+
+// export const getPost=async(
+//     req:Request<{ id: string }>,
+//     res:Response):Promise<void>=>{
+
+//     const {id}=req.params;
+//     try{
+//         const post=await getPostById(Number(id));
+//         if(!post){
+//             res.status(404).json({msg:"not found"});
+//              return;
+//             }
+//         res.json(post);
+//     }catch(err){
+//         res.status(500).json({msg:err});
+//     }
+// };
+export const getPost = async (req: Request<{id:string}>, res: Response):Promise<void> => {
+    const { id } = req.params;
+    try {
+      const post = await getPostById(Number(id));
+      if (!post){
+        res.status(404).json({ message: "Post not found" });
+        return }
+      res.json(post);
+    } catch (error) {
+      res.status(500).json({ message: error});
+    }
+  };
+
+// Get all posts
+export const getPosts = async (req: Request, res: Response) => {
+    try {
+      const posts = await getAllPosts();
+      res.json(posts);
+    } catch (error) {
+      res.status(500).json({ message: error });
+    }
+  };
+
+
+export const addPost=async(req: Request, res: Response)=>{
+        const {title,body,authorId}=req.body;
+        try{
+            const post =await createPost({title,body,authorId});
+            res.status(200).json(post);
+        }catch(err){
+            res.status(500).json({ message: err });
+        }
+}
\ No newline at end of file
diff --git a/backend/src/controllers/userControllers.ts b/backend/src/controllers/userControllers.ts
new file mode 100644
index 0000000..80a60c6
--- /dev/null
+++ b/backend/src/controllers/userControllers.ts
@@ -0,0 +1,34 @@
+import { Request,Response } from "express";
+import { createUser,getUserById,getAllUsers } from "../models/userModel";
+
+export const getUser=async(req:Request<{id:string}>,res:Response):Promise<void>=>{
+    const {id}=req.params;
+    try{
+        const user=await getUserById(Number(id));
+        if(!user){
+            res.sendStatus(404).json({msg:"User not found"});
+            return }
+        res.json(user);
+    }catch(err){
+        res.status(500).json({ message: err});
+    }
+};
+
+export const getUsers=async(req:Request,res:Response)=>{
+    try{
+        const users=await getAllUsers();
+        res.json(users);
+    }catch(err){
+        res.sendStatus(500).json({msg:err});
+    }
+};
+
+export const  addUser=async(req:Request,res:Response)=>{
+    const {name,email,password}=req.body;
+    try{
+        const user=await createUser({name,email,password});
+        res.sendStatus(201).json(user);
+    }catch(err){
+        res.status(500).json({ message: err });
+    }
+}
\ No newline at end of file
diff --git a/backend/src/index.ts b/backend/src/index.ts
index 44d464c..2d7ad2b 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -1,14 +1,7 @@
-import express from "express";
-import cors from "cors"
-import { authRoutes } from "./routes/authRoutes";
-const app=express();
+import app from "./app";
 
-app.use(express.json());
-app.use(cors());
+const PORT = process.env.PORT || 3000;
 
-app.use("/auth",authRoutes);
-
-const PORT=3000;
-app.listen(PORT,()=>{
-    console.log(`listening on port ${PORT}`);
-})
\ No newline at end of file
+app.listen(PORT, () => {
+  console.log(`Server is running on http://localhost:${PORT}`);
+});
\ No newline at end of file
diff --git a/backend/src/middleware/validation.ts b/backend/src/middleware/validation.ts
new file mode 100644
index 0000000..39f04d8
--- /dev/null
+++ b/backend/src/middleware/validation.ts
@@ -0,0 +1,21 @@
+import { Request,Response,NextFunction } from "express";
+import { createPostSchema } from "../validations/postValidation";
+import { createUserSchema } from "../validations/userValidation";
+
+export const validatePost=(req:Request,res:Response,next:NextFunction)=>{
+    try{
+        createPostSchema.parse(req.body);
+        next();
+    }catch(err){
+        res.status(400).json({msg: err});
+    }
+};
+
+export const validateUser=(req:Request,res:Response,next:NextFunction)=>{
+    try{
+        createUserSchema.parse(req.body);
+        next();
+    }catch(err){
+        res.status(400).json({msg:err})
+    };
+};
\ No newline at end of file
diff --git a/backend/src/models/postModel.ts b/backend/src/models/postModel.ts
new file mode 100644
index 0000000..b5946aa
--- /dev/null
+++ b/backend/src/models/postModel.ts
@@ -0,0 +1,21 @@
+import { PrismaClient } from "@prisma/client";
+const prisma = new PrismaClient();
+
+
+export const createPost=async(data:{title:string; body:string; authorId:number})=>{
+    return await prisma.post.create({
+        data, 
+    });
+};
+
+export const getPostById=async (id:number)=>{
+    return await prisma.post.findUnique({
+        where:{id},
+    });
+};
+
+export const getAllPosts=async()=>{
+    return await prisma.post.findMany({
+        include:{author:true}
+    })
+}
\ No newline at end of file
diff --git a/backend/src/models/userModel.ts b/backend/src/models/userModel.ts
new file mode 100644
index 0000000..fc02ed1
--- /dev/null
+++ b/backend/src/models/userModel.ts
@@ -0,0 +1,19 @@
+import { PrismaClient } from "@prisma/client";
+
+const prisma=new PrismaClient();
+
+export const createUser=async (data:{name:string; email:string; password:string})=>{
+    return await prisma.user.create({
+        data,
+    });
+};
+
+export const getUserById=async (id:number)=>{
+    return await prisma.user.findUnique({
+        where:{id},
+    });
+};
+
+export const getAllUsers=async ()=>{
+    return await prisma.user.findMany();
+}
\ No newline at end of file
diff --git a/backend/src/routes/authRoutes.ts b/backend/src/routes/authRoutes.ts
deleted file mode 100644
index 3637c0e..0000000
--- a/backend/src/routes/authRoutes.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import {Router,Request,Response} from "express";
-
-const authRoutes=Router();
-
-authRoutes.get("/",(req:Request,res:Response)=>{
-    res.json("auth sussessful");
-})
-
-export {authRoutes};
\ No newline at end of file
diff --git a/backend/src/routes/postRoutes.ts b/backend/src/routes/postRoutes.ts
new file mode 100644
index 0000000..470808f
--- /dev/null
+++ b/backend/src/routes/postRoutes.ts
@@ -0,0 +1,11 @@
+import {Router} from "express";
+import { addPost,getPost,getPosts } from "../controllers/postControllers";
+import { validatePost } from "../middleware/validation";
+
+const router=Router();
+
+router.get("/",getPosts);
+router.get("/:id",getPost);
+router.post("/",validatePost,addPost);
+
+export default router;
\ No newline at end of file
diff --git a/backend/src/routes/userRoutes.ts b/backend/src/routes/userRoutes.ts
index e69de29..699a46c 100644
--- a/backend/src/routes/userRoutes.ts
+++ b/backend/src/routes/userRoutes.ts
@@ -0,0 +1,11 @@
+import { Router } from "express";
+import { addUser,getUser,getUsers } from "../controllers/userControllers";
+import { validatePost, validateUser } from "../middleware/validation";
+
+const router=Router();
+
+router.get("/",getUsers);
+router.get("/:id",getUser);
+router.post("/",validateUser,addUser);
+
+export default router;
\ No newline at end of file
diff --git a/backend/src/validations/postValidation.ts b/backend/src/validations/postValidation.ts
new file mode 100644
index 0000000..c651645
--- /dev/null
+++ b/backend/src/validations/postValidation.ts
@@ -0,0 +1,12 @@
+import {z} from "zod";
+
+export const createPostSchema=z.object({
+    title:z.string().min(1,"title is required"),
+    body:z.string().min(1,"content is req"),
+    authorId: z.number(),
+})
+
+export const updatePostSchema=z.object({
+    title:z.string().optional(),
+    body:z.string().optional(),
+});
\ No newline at end of file
diff --git a/backend/src/validations/userValidation.ts b/backend/src/validations/userValidation.ts
new file mode 100644
index 0000000..be66c6d
--- /dev/null
+++ b/backend/src/validations/userValidation.ts
@@ -0,0 +1,15 @@
+import { z } from "zod";
+
+
+export const createUserSchema = z.object({
+  name: z.string().min(1, "Name is required"),
+  email: z.string().email("Invalid email address"),
+  password:z.string().min(6,"enter min 6 char")
+});
+
+
+export const updateUserSchema = z.object({
+  name: z.string().optional(),
+  email: z.string().email("Invalid email address").optional(),
+  password:z.string().optional(),
+});
\ No newline at end of file