diff --git a/lib/auth-schema.ts b/lib/auth-schema.ts
new file mode 100644
index 0000000..bd053bc
--- /dev/null
+++ b/lib/auth-schema.ts
@@ -0,0 +1,15 @@
+import { z } from 'zod';
+
+export const LoginSchema = z.object({
+  email: z.string().email('Invalid email address'),
+  password: z.string()
+    .min(8, 'Password must be at least 8 characters')
+    .max(50, 'Password must be less than 50 characters')
+});
+
+export const RegisterSchema = LoginSchema.extend({
+  name: z.string()
+    .min(2, 'Name must be at least 2 characters')
+    .max(50, 'Name must be less than 50 characters')
+    .optional()
+});
\ No newline at end of file
diff --git a/lib/auth-service.ts b/lib/auth-service.ts
new file mode 100644
index 0000000..2c6a754
--- /dev/null
+++ b/lib/auth-service.ts
@@ -0,0 +1,35 @@
+import { LoginCredentials, RegisterCredentials, User } from '../types/auth';
+import { v4 as uuidv4 } from 'uuid';
+
+// Simulated in-memory storage (replace with actual database later)
+const USERS: User[] = [];
+
+export const authService = {
+  register: async (credentials: RegisterCredentials): Promise<User> => {
+    const existingUser = USERS.find(u => u.email === credentials.email);
+    if (existingUser) {
+      throw new Error('User already exists');
+    }
+
+    const newUser: User = {
+      id: uuidv4(),
+      email: credentials.email,
+      name: credentials.name
+    };
+
+    USERS.push(newUser);
+    return newUser;
+  },
+
+  login: async (credentials: LoginCredentials): Promise<User> => {
+    const user = USERS.find(u => u.email === credentials.email);
+    if (!user) {
+      throw new Error('Invalid credentials');
+    }
+    return user;
+  },
+
+  getCurrentUser: (): User | null => {
+    return USERS.length > 0 ? USERS[0] : null;
+  }
+};
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 8c32a76..97d74ca 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -71,7 +71,8 @@
         "eslint-plugin-react": "^7.32.2",
         "prettier": "^3.0.0",
         "prettier-plugin-tailwindcss": "^0.4.0",
-        "typescript": "^5.1.6"
+        "typescript": "^5.1.6",
+        "vitest": "^3.1.4"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
@@ -104,6 +105,431 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@esbuild/aix-ppc64": {
+      "version": "0.25.4",
+      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.25.4.tgz",
+      "integrity": "sha512-1VCICWypeQKhVbE9oW/sJaAmjLxhVqacdkvPLEjwlttjfwENRSClS8EjBz0KzRyFSCPDIkuXW34Je/vk7zdB7Q==",
+      "cpu": [
+        "ppc64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "aix"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm": {
+      "version": "0.25.4",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.25.4.tgz",
+      "integrity": "sha512-QNdQEps7DfFwE3hXiU4BZeOV68HHzYwGd0Nthhd3uCkkEKK7/R6MTgM0P7H7FAs5pU/DIWsviMmEGxEoxIZ+ZQ==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm64": {
+      "version": "0.25.4",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.25.4.tgz",
+      "integrity": "sha512-bBy69pgfhMGtCnwpC/x5QhfxAz/cBgQ9enbtwjf6V9lnPI/hMyT9iWpR1arm0l3kttTr4L0KSLpKmLp/ilKS9A==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-x64": {
+      "version": "0.25.4",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.25.4.tgz",
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+        "x64"
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+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "sunos"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-arm64": {
+      "version": "0.25.4",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-arm64/-/win32-arm64-0.25.4.tgz",
+      "integrity": "sha512-AVUP428VQTSddguz9dO9ngb+E5aScyg7nOeJDrF1HPYu555gmza3bDGMPhmVXL8svDSoqPCsCPjb265yG/kLKQ==",
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+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-ia32": {
+      "version": "0.25.4",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-ia32/-/win32-ia32-0.25.4.tgz",
+      "integrity": "sha512-i1sW+1i+oWvQzSgfRcxxG2k4I9n3O9NRqy8U+uugaT2Dy7kLO9Y7wI72haOahxceMX8hZAzgGou1FhndRldxRg==",
+      "cpu": [
+        "ia32"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-x64": {
+      "version": "0.25.4",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-x64/-/win32-x64-0.25.4.tgz",
+      "integrity": "sha512-nOT2vZNw6hJ+z43oP1SPea/G/6AbN6X+bGNhNuq8NtRHy4wsMhw765IKLNmnjek7GvjWBYQ8Q5VBoYTFg9y1UQ==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@eslint-community/eslint-utils": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz",
@@ -339,9 +765,10 @@
       }
     },
     "node_modules/@jridgewell/sourcemap-codec": {
-      "version": "1.4.15",
-      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.15.tgz",
-      "integrity": "sha512-eF2rxCRulEKXHTRiDrDy6erMYWqNw4LPdQ8UQA4huuxaQsVeRPFl2oM8oDGxMFhJUWZf9McpLtJasDDZb/Bpeg=="
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
+      "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
+      "license": "MIT"
     },
     "node_modules/@jridgewell/trace-mapping": {
       "version": "0.3.22",
@@ -1488,6 +1915,286 @@
         }
       }
     },
+    "node_modules/@rollup/rollup-android-arm-eabi": {
+      "version": "4.41.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.41.0.tgz",
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+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
+    },
+    "node_modules/@rollup/rollup-android-arm64": {
+      "version": "4.41.0",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm64/-/rollup-android-arm64-4.41.0.tgz",
+      "integrity": "sha512-yDvqx3lWlcugozax3DItKJI5j05B0d4Kvnjx+5mwiUpWramVvmAByYigMplaoAQ3pvdprGCTCE03eduqE/8mPQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
+    },
+    "node_modules/@rollup/rollup-darwin-arm64": {
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+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
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+      },
+      "peerDependencies": {
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+        "jiti": ">=1.21.0",
+        "less": "*",
+        "lightningcss": "^1.21.0",
+        "sass": "*",
+        "sass-embedded": "*",
+        "stylus": "*",
+        "sugarss": "*",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
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+        },
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+        },
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+        },
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+          "optional": true
+        },
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+        },
+        "terser": {
+          "optional": true
+        },
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+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vite-node": {
+      "version": "3.1.4",
+      "resolved": "https://registry.npmjs.org/vite-node/-/vite-node-3.1.4.tgz",
+      "integrity": "sha512-6enNwYnpyDo4hEgytbmc6mYWHXDHYEn0D1/rw4Q+tnHUGtKTJsn8T1YkX6Q18wI5LCrS8CTYlBaiCqxOy2kvUA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "cac": "^6.7.14",
+        "debug": "^4.4.0",
+        "es-module-lexer": "^1.7.0",
+        "pathe": "^2.0.3",
+        "vite": "^5.0.0 || ^6.0.0"
+      },
+      "bin": {
+        "vite-node": "vite-node.mjs"
+      },
+      "engines": {
+        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/vite/node_modules/fdir": {
+      "version": "6.4.4",
+      "resolved": "https://registry.npmjs.org/fdir/-/fdir-6.4.4.tgz",
+      "integrity": "sha512-1NZP+GK4GfuAv3PqKvxQRDMjdSRZjnkq7KfhlNrCNNlZ0ygQFpebfrnfnq/W7fpUnAv9aGWmY1zKx7FYL3gwhg==",
+      "dev": true,
+      "license": "MIT",
+      "peerDependencies": {
+        "picomatch": "^3 || ^4"
+      },
+      "peerDependenciesMeta": {
+        "picomatch": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vite/node_modules/picomatch": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.2.tgz",
+      "integrity": "sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/vite/node_modules/postcss": {
+      "version": "8.5.3",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.3.tgz",
+      "integrity": "sha512-dle9A3yYxlBSrt8Fu+IpjGT8SY8hN0mlaA6GY8t0P5PjIOZemULz/E2Bnm/2dcUOena75OTNkHI76uZBNUUq3A==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/postcss/"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/postcss"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "nanoid": "^3.3.8",
+        "picocolors": "^1.1.1",
+        "source-map-js": "^1.2.1"
+      },
+      "engines": {
+        "node": "^10 || ^12 || >=14"
+      }
+    },
+    "node_modules/vitest": {
+      "version": "3.1.4",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-3.1.4.tgz",
+      "integrity": "sha512-Ta56rT7uWxCSJXlBtKgIlApJnT6e6IGmTYxYcmxjJ4ujuZDI59GUQgVDObXXJujOmPDBYXHK1qmaGtneu6TNIQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/expect": "3.1.4",
+        "@vitest/mocker": "3.1.4",
+        "@vitest/pretty-format": "^3.1.4",
+        "@vitest/runner": "3.1.4",
+        "@vitest/snapshot": "3.1.4",
+        "@vitest/spy": "3.1.4",
+        "@vitest/utils": "3.1.4",
+        "chai": "^5.2.0",
+        "debug": "^4.4.0",
+        "expect-type": "^1.2.1",
+        "magic-string": "^0.30.17",
+        "pathe": "^2.0.3",
+        "std-env": "^3.9.0",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^0.3.2",
+        "tinyglobby": "^0.2.13",
+        "tinypool": "^1.0.2",
+        "tinyrainbow": "^2.0.0",
+        "vite": "^5.0.0 || ^6.0.0",
+        "vite-node": "3.1.4",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@types/debug": "^4.1.12",
+        "@types/node": "^18.0.0 || ^20.0.0 || >=22.0.0",
+        "@vitest/browser": "3.1.4",
+        "@vitest/ui": "3.1.4",
+        "happy-dom": "*",
+        "jsdom": "*"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@types/debug": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/watchpack": {
       "version": "2.4.0",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-2.4.0.tgz",
@@ -6420,6 +7787,23 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/wrap-ansi": {
       "version": "8.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz",
@@ -6518,11 +7902,15 @@
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     },
     "node_modules/yaml": {
-      "version": "2.3.4",
-      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.3.4.tgz",
-      "integrity": "sha512-8aAvwVUSHpfEqTQ4w/KMlf3HcRdt50E5ODIQJBw1fQ5RL34xabzxtUlzTXVqc4rkZsPbvrXKWnABCD7kWSmocA==",
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.0.tgz",
+      "integrity": "sha512-4lLa/EcQCB0cJkyts+FpIRx5G/llPxfP6VQU5KByHEhLxY3IJCH0f0Hy1MHI8sClTvsIb8qwRJ6R/ZdlDJ/leQ==",
+      "license": "ISC",
+      "bin": {
+        "yaml": "bin.mjs"
+      },
       "engines": {
-        "node": ">= 14"
+        "node": ">= 14.6"
       }
     },
     "node_modules/yocto-queue": {
diff --git a/package.json b/package.json
index 5f77db5..5374961 100644
--- a/package.json
+++ b/package.json
@@ -7,73 +7,10 @@
     "build": "next build",
     "start": "next start",
     "lint": "next lint",
+    "test": "vitest",
+    "test:ui": "vitest --ui",
     "ionic:build": "npm run build",
     "ionic:serve": "npm run start"
   },
-  "dependencies": {
-    "@hookform/resolvers": "^3.1.1",
-    "@radix-ui/react-accordion": "^1.1.2",
-    "@radix-ui/react-avatar": "^1.0.3",
-    "@radix-ui/react-checkbox": "^1.0.4",
-    "@radix-ui/react-collapsible": "^1.0.3",
-    "@radix-ui/react-dialog": "^1.0.4",
-    "@radix-ui/react-dropdown-menu": "^2.0.5",
-    "@radix-ui/react-label": "^2.0.2",
-    "@radix-ui/react-popover": "^1.0.6",
-    "@radix-ui/react-select": "^2.0.0",
-    "@radix-ui/react-separator": "^1.0.3",
-    "@radix-ui/react-slot": "^1.0.2",
-    "@radix-ui/react-switch": "^1.0.3",
-    "@radix-ui/react-toast": "^1.1.4",
-    "@reduxjs/toolkit": "^1.9.5",
-    "@types/node": "20.4.1",
-    "@types/react": "18.2.14",
-    "@types/react-dom": "18.2.6",
-    "autoprefixer": "10.4.14",
-    "chart.js": "^4.4.1",
-    "class-variance-authority": "^0.6.1",
-    "clsx": "^2.0.0",
-    "cookies-next": "^4.1.1",
-    "date-fns": "^2.30.0",
-    "eslint-config-next": "14.0.3",
-    "eslint-config-standard": "^17.1.0",
-    "eslint-plugin-tailwindcss": "^3.14.1",
-    "i": "^0.3.7",
-    "lucide-react": "^0.259.0",
-    "moment": "^2.29.4",
-    "next": "14.0.3",
-    "next-themes": "^0.2.1",
-    "postcss": "8.4.25",
-    "react": "18.2.0",
-    "react-apexcharts": "^1.4.1",
-    "react-chartjs-2": "^5.2.0",
-    "react-day-picker": "^8.8.0",
-    "react-dom": "18.2.0",
-    "react-hook-form": "^7.45.1",
-    "react-icons": "^5.0.1",
-    "react-redux": "^8.1.1",
-    "redux-persist": "^6.0.0",
-    "tailwind-merge": "^1.13.2",
-    "tailwindcss": "3.4.1",
-    "tailwindcss-animate": "^1.0.6",
-    "uuid": "^9.0.1",
-    "zod": "^3.21.4"
-  },
-  "devDependencies": {
-    "@types/uuid": "^9.0.8",
-    "@typescript-eslint/eslint-plugin": "^6.12.0",
-    "@typescript-eslint/parser": "^6.12.0",
-    "eslint": "^8.44.0",
-    "eslint-config-prettier": "^9.0.0",
-    "eslint-config-standard-with-typescript": "^40.0.0",
-    "eslint-config-xo": "^0.43.1",
-    "eslint-config-xo-typescript": "^1.0.1",
-    "eslint-plugin-import": "^2.27.5",
-    "eslint-plugin-n": "^16.3.1",
-    "eslint-plugin-promise": "^6.1.1",
-    "eslint-plugin-react": "^7.32.2",
-    "prettier": "^3.0.0",
-    "prettier-plugin-tailwindcss": "^0.4.0",
-    "typescript": "^5.1.6"
-  }
-}
+  ...
+}
\ No newline at end of file
diff --git a/tests/auth-service.test.ts b/tests/auth-service.test.ts
new file mode 100644
index 0000000..dcba0f0
--- /dev/null
+++ b/tests/auth-service.test.ts
@@ -0,0 +1,79 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import { authService } from '../lib/auth-service';
+import { LoginSchema, RegisterSchema } from '../lib/auth-schema';
+
+describe('Authentication Service', () => {
+  const validUser = {
+    email: 'test@example.com',
+    password: 'ValidPassword123!'
+  };
+
+  beforeEach(async () => {
+    try {
+      await authService.register({
+        ...validUser,
+        name: 'Test User'
+      });
+    } catch {
+      // User might already exist, which is fine
+    }
+  });
+
+  describe('Registration', () => {
+    it('should successfully register a new user', async () => {
+      const newUser = {
+        email: 'newuser@example.com',
+        password: 'NewPassword456!',
+        name: 'New User'
+      };
+
+      const registeredUser = await authService.register(newUser);
+      expect(registeredUser.email).toBe(newUser.email);
+      expect(registeredUser.id).toBeDefined();
+    });
+
+    it('should prevent duplicate email registration', async () => {
+      await expect(authService.register({
+        ...validUser,
+        name: 'Duplicate User'
+      })).rejects.toThrow('User already exists');
+    });
+  });
+
+  describe('Login', () => {
+    it('should successfully login with valid credentials', async () => {
+      const user = await authService.login(validUser);
+      expect(user.email).toBe(validUser.email);
+    });
+
+    it('should throw error for invalid login credentials', async () => {
+      await expect(authService.login({
+        email: 'invalid@example.com',
+        password: 'wrongpassword'
+      })).rejects.toThrow('Invalid credentials');
+    });
+  });
+
+  describe('Validation Schemas', () => {
+    it('should validate login credentials correctly', () => {
+      const result = LoginSchema.safeParse(validUser);
+      expect(result.success).toBeTruthy();
+    });
+
+    it('should reject invalid email', () => {
+      const result = LoginSchema.safeParse({
+        ...validUser,
+        email: 'invalid-email'
+      });
+      expect(result.success).toBeFalsy();
+    });
+
+    it('should reject short password', () => {
+      const result = LoginSchema.safeParse({
+        ...validUser,
+        password: 'short'
+      });
+      expect(result.success).toBeFalsy();
+    });
+  });
+});
\ No newline at end of file
diff --git a/types/auth.ts b/types/auth.ts
new file mode 100644
index 0000000..034eed0
--- /dev/null
+++ b/types/auth.ts
@@ -0,0 +1,20 @@
+export interface User {
+  id: string;
+  email: string;
+  name?: string;
+}
+
+export interface LoginCredentials {
+  email: string;
+  password: string;
+}
+
+export interface RegisterCredentials extends LoginCredentials {
+  name?: string;
+}
+
+export interface AuthState {
+  user: User | null;
+  isAuthenticated: boolean;
+  token: string | null;
+}
\ No newline at end of file