I want to order writing a login library for Dart / Flutter

Job description

I will commission to write a library similar to this one.

https://github.com/firebase/flutterfire/tree/master/packages/firebase_crashlytics/firebase_crashlytics

For the Muscula project

https://www.muscula.com/

Required functions:

1) Logging errors

2) Sending a request in json format with stacktrac to an external endpoint.

Operating System:

iOS, Android, Web

Creating an adequate library for other languages took from 1 to several hours, so I would ask you to give yourself quotes for a month of work.