Require to fill extra registration/profile fields

Hi,

running into the following problem: we want to offer social login (fb) but also require extra registration fields.

What we would need is similar to what happens when “Allow Username change” is set to yes. After being redirected from FB, the user would see the form to add our custom fields (we can edit wsl.users.gateway.php).

The only way we’ve been able to do that is when Allow Username change is indeed set to yes. But using that function creates an issue where the initial registration process is fine but when the user tries to log in they are *again* represented that page where they’d change their username + add in other data – instead of being logged in.

So what we are after is either:

1. how do we force users to fill out other fields (showing similar screen to change username + email) or
2. how do we fix the mentioned allow username change where after being first registered -> logged out and trying to log in again the user would be logged in, not get the edit username screen.