code: def add_url(self, pattern, method=None, call=None):
          
          self._url_manager.add(pattern, method, call)
docs: Add a url pattern.
  
          Args:
              pattern (:obj:`str`): URL pattern to add. This is usually '/'
                  separated path. Parts of the URL can be parameterised using
                  curly braces.
                  Examples: "/", "/path/to/resource", "/resoures/{param}"
              method (:obj:`str`, :obj:`list` of :obj:`str`, optional): HTTP
                  methods for the path specied. By default, GET method is added.
                  Value can be either a single method, by passing a string, or
                  multiple methods, by passing a list of strings.
              call (callable): Callable corresponding to the url pattern and the
                  HTTP method specified.
  
          Note:
              A trailing '/' is always assumed in the pattern.
  
          See Also:
              :func:`drongo.managers.url.UrlManager.add`