code: def access_token(self, value, request):
          
  
          if self.validate(value, request) is not None:
              return None
          
          access_token = AccessToken.objects.for_token(value)
          
          return access_token
docs: Try to get the `AccessToken` associated with the provided token.
  
          *The provided value must pass `BearerHandler.validate()`*