code: def avatar_url_as(self, *, format=None, size=1024):
          
          if self.avatar is None:
              # Default is always blurple apparently
              return Asset(self._state, 'https://cdn.discordapp.com/embed/avatars/0.png')
  
          if not utils.valid_icon_size(size):
              raise InvalidArgument("size must be a power of 2 between 16 and 1024")
  
          format = format or 'png'
  
          if format not in ('png', 'jpg', 'jpeg'):
              raise InvalidArgument("format must be one of 'png', 'jpg', or 'jpeg'.")
  
          url = 'https://cdn.discordapp.com/avatars/{0.id}/{0.avatar}.{1}?size={2}'.format(self, format, size)
          return Asset(self._state, url)
docs: Returns a friendly URL version of the avatar the webhook has.
  
          If the webhook does not have a traditional avatar, their default
          avatar URL is returned instead.
  
          The format must be one of 'jpeg', 'jpg', or 'png'.
          The size must be a power of 2 between 16 and 1024.
  
          Parameters
          -----------
          format: Optional[:class:`str`]
              The format to attempt to convert the avatar to.
              If the format is ``None``, then it is equivalent to png.
          size: :class:`int`
              The size of the image to display.
  
          Raises
          ------
          InvalidArgument
              Bad image format passed to ``format`` or invalid ``size``.
  
          Returns
          --------
          :class:`Asset`
              The resulting CDN asset.