code: def assign_extension_to_users(self, body):
          
          content = self._serialize.body(body, 'ExtensionAssignment')
          response = self._send(http_method='PUT',
                                location_id='8cec75ea-044f-4245-ab0d-a82dafcc85ea',
                                version='5.0-preview.1',
                                content=content)
          return self._deserialize('[ExtensionOperationResult]', self._unwrap_collection(response))
docs: AssignExtensionToUsers.
          [Preview API] Assigns the access to the given extension for a given list of users
          :param :class:`<ExtensionAssignment> <azure.devops.v5_0.licensing.models.ExtensionAssignment>` body: The extension assignment details.
          :rtype: [ExtensionOperationResult]