text: """
      Exceptions
  """
  from django.utils.translation import ugettext_lazy as _
  from rest_framework import exceptions, status
  
  
  class TokenError(Exception):
      pass
  
  
  class TokenBackendError(Exception):
      pass
  
  
  class DetailDictMixin:
      def __init__(self, detail=None, code=None):
          """
          Builds a detail dictionary for the error to give more information to API
          users.
          """
          detail_dict = {"detail": self.default_detail, "code": self.default_code}
  
          if isinstance(detail, dict):
              detail_dict.update(detail)
          elif detail is not None:
              detail_dict["detail"] = detail
  
          if code is not None:
              detail_dict["code"] = code
  
          super().__init__(detail_dict)
  
  
  class AuthenticationFailed(DetailDictMixin, exceptions.AuthenticationFailed):
      pass
  
  
  class InvalidToken(AuthenticationFailed):
      status_code = status.HTTP_401_UNAUTHORIZED
      default_detail = _("Token is invalid or expired")
      default_code = "token_not_valid"
  