Mobile App Login Issue Fix

I need assistance with a mobile app issue that is affecting both iOS and Android platforms. The app in question is encountering a login issue.

Ideal Skills and Experience:
- Proven experience in mobile app (iOS and Android) troubleshooting
- Proficient in diagnosing login-related issues
- Excellent problem-solving skills
- Familiarity with cross-platform mobile apps
- Ability to work under tight deadlines