Log Out New Users if Reg Closed

[harshkhandeparkar]

Describe the bug

After registrations are closed, new users are allowed to log in, their profile picture is displayed but the registration form does not open.

Steps to reproduce

1. Set REGISTRATIONS_OPEN env var to false.
2. Log in with an unregistered account.

Expected behavior

The user should be immediately logged out with an error message saying that the user is not registered.

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No response

Additional Information

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