Write Unit Tests for login.ts API Route

[Sallin142]

Description:

• Develop unit tests for the login.ts API route to ensure it handles login logic correctly.

Subtasks:

• [x] Create src/app/auth/api/onboard/login.test.ts.
• [x] Write tests to verify successful login, invalid credentials, and error handling.
• [x] Input: Valid and invalid email/password combinations.
• [x] Output: 200 for successful login, 401 for invalid credentials.

Reference: API Documentation

Endpoint: POST /auth/login Inputs: { "email": "test@example.com", "password": "password123" }

Outputs: { "status": "success", "data": { "user": { "id": "123" } }, "message": "Login successful" } { "status": "error", "error": { "code": 401, "message": "Invalid credentials" } }