Describe the bug
When using SSO to log in to Mbin, it seems to always redirect to the home page. This makes it impossible to log in to an Mbin app using SSO, since once authenticated, the Mbin server needs to redirect to the URL provided by the client, not to the home page.

On which Mbin instance did you find the bug?
thebrainbin.org and any other instances with SSO enabled.

Which Mbin version was running on the instance?
1.8.2

To Reproduce
Steps to reproduce the behavior:

1. Open Interstellar.
2. Add a new account.
3. Select thebrainbin.org (or a different instance with SSO enabled).
4. Click "Login".
5. Once the browser opens, select one of the SSO options and complete the SSO authentication.
6. From there, you will notice you're now on the Mbin home page, and you will be unable to complete the login process through the app.

Expected behavior
Once logged in through SSO, it will redirect to the provided Oauth redirect URL.

Additional context
This bug is only present for SSO login options, not email/password.