Example: Stackoverflow has OAuth2 possibilities to login user. User proceed with OAuth2 framework and logged in by Google credentials. Now Stackoverflow has all required info about user, most important email address.
- Does Stackoverflow save this data to their own users database?
Now user is authenticated with token and has permission to setup his/her account.
- Why Stackoverflow (or OAuth2 client) doesn't have setting to setup my password right away? So next time I authenticate myself by using Stackoverflow's form?