Enhancement: Facebook sign-in

[ScottishRoss]

Along with Google Sign-In, users should be able to sign in with a Facebook account.

Facebook sign-in implemented.
A new user is created on Facebook sign-in.
If that Users email already exists (i.e. via Google sign-in), the login details are combined.
Sign-out of Facebook button added to Preferences.

[saksham-gt]

Can I take this issue? @ScottishRoss

[ScottishRoss]

@sudo-saksham I have made significant changes to the Develop branch to clean some stuff up. Can you make sure you pull the most recent develop branch.

[saksham-gt]

Sure, I'll pull.

[saksham-gt]

Can you create a separate branch on your repo for this feature? I'll make a PR into that branch itself so that if something's not correct than it won't affect the rest of the code. @ScottishRoss

[ScottishRoss]

That's what you're doing. If you clone the repo, create a new branch and work on that. You can then merge that locally to see if it works and raise the PR to the Develop branch on this repo.

[saksham-gt]

Hey, I'm getting this error when I'm logging in with Facebook auth. I'm running this app on Android 11 and I have also implemented this FAQ answer given in the URL, but it's still showing me this and hence the token provided is null. Therefore, I cannot login with Facebook :

W/com.facebook.internal.NativeProtocol( 9966): Apps that target Android API 30+ (Android 11+) cannot call Facebook native apps unless the package visibility needs are declared. Please follow https://developers.facebook.com/docs/android/troubleshooting/#faq_267321845055988 to make the declaration.

Do you know what might be the solution? @ScottishRoss

[saksham-gt]

For the reference, I implemented that suggestion given in the log like this :