code: function _getIdByUsername(username) {
  	const url = `${API}/get-user-id`;
  	const params = {
  		app: 3,
  		username
  	};
  
  	return http
  		.GET(url, params)
  		.then(data => data.user_id);
  }
docs: Retrieve the user id associated with the devRant
  username.
  
  @private
  
  @param  {String} username - the devRant username
  
  @return {Promise} Resolves with the user id