1Install Dependencies
Add the http and shared_preferences packages to the pubspec.yaml file.
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2Create the auth_service.dart file
In this step, create the auth_service.dart file to handle OTP verification and JWT storage.
3Create the login_screen.dart file
Create a separate file for the login screen to handle OTP input and verification.
4Create the main.dart file
Set up the main.dart file to handle the navigation between authenticated and unauthenticated screens.
5Run the Flutter app
Run the Flutter app using the command to test the login and authentication flow.