Fix error on both iOS & Android

My production app throws users out the moment they submit their login details. The binary opens fine, they type email and password, hit the button, and—boom—both the iOS and Android builds crash. There’s no credential-related warning; it’s a straight application crash that only happens after the login request is fired.

I need a developer who can:

• reproduce the issue on both platforms
• trace the point of failure in the authentication flow (Swift / Kotlin, or React Native / Flutter if our hybrid stack reveals itself to be the culprit)
• patch the bug, test on real devices and simulators, and return safe, signed builds ready for App Store and Play release

Alongside the fixed builds I’ll need a short change log describing what actually caused the crash and the key code adjustments, so our in-house team can review and merge into the main branch.

If you’re confident with crash logs, Xcode, Android Studio and whatever backend auth calls you uncover, let’s get this resolved quickly.