Description:

As part of our app's social login feature, we would like to add the ability for users to authenticate using their Twitter account. The implementation should include the ability for users to sign in, sign out, and retrieve their Twitter profile information.

Here are the specific requirements for this feature:

• Allow users to sign in with their Twitter account
• Allow users to sign out of their Twitter account
• Retrieve the user's Twitter profile information (name, email, profile picture, etc.)
• Handle errors and display appropriate messages to the user
• Implement a way to check if the user is already logged in
• Use the button in the app's login/signup screen to initiate the Twitter authentication process

Acceptance Criteria:

• User can sign in to the app with their Twitter account
• User can sign out of their Twitter account
• User's Twitter profile information is retrieved and displayed in the app
• Error messages are displayed to the user when appropriate
• The app can check if the user is already logged in with their Twitter account
• A button or link is added to the app's login screen to initiate the Twitter authentication process

Notes:

The implementation should be done using the official Twitter API and Flutter package
Test the feature on both Android and iOS platforms
Provide a sample code snippet to initialize the Twitter API in the app
Provide a sample code snippet for the sign-in flow