Add POST /api/auth/login endpoint that authenticates users by email and
password, returning a JWT token on success. Also fixes a critical bug
where expired or malformed JWT tokens in the Authorization header caused
unhandled exceptions, crashing requests to all endpoints including public
ones like registration.
Changes:
- Add AuthController.login() endpoint with LoginRequest DTO
- Add UserService.authenticate() that validates credentials and throws
InvalidCredentialsException on failure
- Add InvalidCredentialsException and GlobalExceptionHandler handler
that maps it to 401 with Swedish error message
- Fix JwtAuthenticationFilter to catch JwtException (expired, malformed)
and pass through without crashing — the filter now acts as a graceful
enricher rather than a gatekeeper
- Add 5 controller tests for login endpoint (success, 401, validation)
- Add 4 service tests for authenticate() (success, email not found,
password mismatch, email normalization)
- Add 2 filter tests for expired and malformed token pass-through
Joakim Mörling
3d4a6daee9