Create User Model & Authentification

[davidbrueninghoff-bit]

Daily Backend Tasks – Done ✅

• User model checked & password hashing works
• Auth routes working (register/login)
• JWT token generation tested
• Auth middleware restricts access to logged-in users
• Server runs and responds correctly
• Issue routes working (POST/GET)
• Postman tests done:
  • Register users
  • Login users
  • Create issues with token
  • Access denied without token
• JSON payloads & Content-Type correct
• Multiple test users created (David, Liesa, Max)
• Error handling checked
• Issue model verified
• Local testing complete (201/400/401 responses)