New signup with mariadb

[Zharkan]

Your question
How can I prevent new users from signin up ?

What are you trying to do
I'm trying to prevent unknown users from signing up. I've tried with callback from the doc but I can't get it to work.

Feedback
Documentation refers to searching through online documentation, code comments and issue history. The example project refers to next-auth-example.

• Found the documentation helpful
• Found documentation but was incomplete
• Could not find relevant documentation
• Found the example project helpful
• Did not find the example project helpful

[StefanSelfTaught]

You can try to return false in the signIn callback.

[Zharkan]

I'm aware of that but how can I check if a user has an account ?

[StefanSelfTaught]

Check for user.id

[Zharkan]

Should I check in the callback then ?
async signIn(userId, account, profile) { const isAllowedToSignIn = true if (isAllowedToSignIn) { return true } else { return false } }

[StefanSelfTaught]

Try this:

async signIn(user) {
  if(!user.id) return false;
  return true;  
}

[Zharkan]

Yes that's perfect, thank you !