code: function(name) {
                  console.log('oauthInterface.user.username');
  
                  var params = corbel.utils.extend(this.params, {});
                  params.url = this._buildUri('username/' + name);
                  params.method = corbel.request.method.GET;
  
                  return this.request(params);
              }
docs: Clients can use this endpoint to obtain the user id.
  @method
  @memberOf corbel.Oauth.UsersBuilder
  
  @param {Object} name     The username
  
  @returns {Promise} Q promise that resolves to undefined(void) or rejects with a {@link CorbelError}