I have API server written with Adonis JS (it handles REST calls, auth, contain DB). When user login/register successful server return opaque access token.
I need to create Flutter App and it should use existing server. Also i need to add social authentication (google, twitter, facebook). I'm thinking of creating user on my server when social API return user credentials.
But i'm totally confused with the way it should work. How to initiate process of social login (from app or from server?). Who should handle redirects/callbacks from auth app. How to handle case when created user login again with social app.
I will appreciate if someone can describe that process (general overview).
Thank you!