old_contents: from django.core.exceptions import MultipleObjectsReturned
  
  from account.models import EmailAddress
  
  from social_auth.utils import setting
  from social_auth.models import User
  from social_auth.backends.pipeline import warn_setting
  from social_auth.backends.exceptions import AuthException
  
  
  def associate_by_email(details, *args, **kwargs):
      """Return user entry with same email address as one returned on details."""
      email = details.get('email')
  
      warn_setting('SOCIAL_AUTH_ASSOCIATE_BY_MAIL', 'associate_by_email')
  
      if email and setting('SOCIAL_AUTH_ASSOCIATE_BY_MAIL', True):
          # try to associate accounts registered with the same email address,
          # only if it's a single object. AuthException is raised if multiple
          # objects are returned
          try:
              address = EmailAddress.objects.filter(email=email, verified=True).select_related("user").get()
              return {"user": address.user}
          except MultipleObjectsReturned:
              raise AuthException(kwargs['backend'], 'Not unique email address.')
          except User.DoesNotExist:
              pass
  
new_contents: from django.core.exceptions import MultipleObjectsReturned
  
  from account.models import EmailAddress
  
  from social_auth.utils import setting
  from social_auth.models import User
  from social_auth.backends.pipeline import warn_setting
  from social_auth.backends.exceptions import AuthException
  
  
  def associate_by_email(details, *args, **kwargs):
      """Return user entry with same email address as one returned on details."""
      email = details.get('email')
  
      warn_setting('SOCIAL_AUTH_ASSOCIATE_BY_MAIL', 'associate_by_email')
  
      if email and setting('SOCIAL_AUTH_ASSOCIATE_BY_MAIL', True):
          # try to associate accounts registered with the same email address,
          # only if it's a single object. AuthException is raised if multiple
          # objects are returned
          try:
              address = EmailAddress.objects.filter(email=email, verified=True).select_related("user").get()
              return {"user": address.user}
          except MultipleObjectsReturned:
              raise AuthException(kwargs['backend'], 'Not unique email address.')
          except EmailAddress.DoesNotExist:
              pass
  
subject: fix the exception to the correct one