docs: def _init_app(self, app):
          """Perform initialization actions with the given :class:`flask.Flask`
          object.
  
          :param app: The flask application object
          :type app: flask.Flask
          """
          app.handle_exception = partial(self.error_router, app.handle_exception)
          app.handle_user_exception = partial(self.error_router, app.handle_user_exception)
  
          if len(self.resources) > 0:
              for resource, urls, kwargs in self.resources:
                  self._register_view(app, resource, *urls, **kwargs)