Attempts to create an user even if it already exists

Problem/Motivation

In certain cases, the module attempts to create an user even if it already exists. In my setup, user account creation requires admin approval and hence the users can't login. The relevant code block is:

      if ($drupal_user) {
        if ($this->userManager->loginUser($drupal_user, 'social_auth_google')) {
          return $this->redirect('user.page');
        }
      }

The code above assumes that if the user exists, we would definitely do an early return. However, this isn't the case in the scenario I described above. If we don't do an early return, the code goes on to attempt to create an user (which fails, of course).

Proposed resolution

Rewrite the condition to always return early if the user exists