Coding Challenge

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Task

Please write an iOS app in Swift, that contains two screens as described below:

Login screen
- text field for email (validate for existence of "@", change border colors to black/red/blue)
- text field for password (validate for non-empty, change border colors to black/red/blue)
- button for login
  - disable on validation failure
  - title
    - "Login" (default)
    - "Cancel" (while request is running)
    - "Try again" (after request has failed)
- activity indicator (when request is running)
- error label
  - empty (default)
  - text (localizedMessage from backend, when request has failed)
Success screen
- label "hello."
- navigation bar with back button
Networking
- https://p0jtvgfrj3.execute-api.eu-central-1.amazonaws.com/test/authenticate
- POST { "email": "...", "password": "..." } (fill in values)
- expect (200, 401 or 500 will be randomly returned by the api, so you will see all the cases in the app)
  - 200: { "token": "uuidv4", "message": "Sample greetings message" }
  - 401: { "message": "Sample authentication error message" }
  - 4xx/5xx (if something really goes wrong)
Architecture
- follow the architecture provided in the template app (MVP)
Notes
- use of libraries/CocoaPods/Carthage is permitted (not necessary). Make sure to include all libraries in your project, so a simple build/run of the app will work without any other setup.
Version control
- create a branch test/firstname-lastname * making meaningful commits during implementation is a plus * review your branch before sending it

Please send the result zipped (including .git folder) via email when you are done.