new_contents: from django.contrib.auth.forms import AuthenticationForm
  from django.forms import forms
  from django.utils.translation import gettext as _
  
  from .models import UserProfile
  
  
  class UserProfileAuthenticationForm(AuthenticationForm):
      def confirm_login_allowed(self, user):
          try:
              UserProfile.objects.get(user=user)
          except UserProfile.DoesNotExist:
              raise forms.ValidationError(_('No profile found for this user'),
                                          code='no_profile')
  
subject: Add custom login form