listFollowing(cb) {
      return this._request('GET', this.__getScopedUrl('following'), null, cb);
   }
Lists the people who the authenticated user follows.
@see https://docs.github.com/en/rest/reference/users#list-the-people-the-authenticated-user-follows
@param {Requestable.callback} [cb] - will receive the list of who a user is following
@return {Promise} - the promise for the http request