Exercises G32

When attempting to log in to the mobile app, the application crashes immediately after providing valid credentials and clicking the "Log in" button

Steps to Reproduce:
1. Open the mobile app without being logged in
2. Browse through articles
3. Click the "Log in" button to open the login screen
5. Enter valid credentials
6. Click the "Log in" button to submit the credentials
7. Observe the app crashing immediately

Expected Result:
The app should successfully log in the user after providing valid credentials, granting access to all features that require authentication, including commenting on articles. No crashes should occur.

Actual Result:
The app crashes immediately after clicking the "Log in" button, preventing the user from logging in. The crash occurs consistently on every login attempt, even after restarting the app

Platform: mobile app