text: /* app.js */
  export const REQUEST_NOT_FOUND = 'REQUEST_NOT_FOUND';
  export const REQUEST_DUPLICATE = 'REQUEST_DUPLICATE';
  export const REQUEST_WARNING = 'REQUEST_WARNING';
  export const REQUEST_FAILURE = 'REQUEST_FAILURE';
  export const REQUEST_SUCCEED = 'REQUEST_SUCCEED';
  export const REQUEST_DENIED = 'REQUEST_DENIED';
  export const LOADING = 'LOADING';
  export const END_LOADING = 'END_LOADING';
  
  /* auth.js */
  export const LOGIN = 'LOGIN';
  export const LOGIN_SUCCESS = 'LOGIN_SUCCESS';
  export const LOGIN_FAILURE = 'LOGIN_FAILURE';
  export const LOGOUT = 'LOGOUT';
  export const IS_LOGIN = 'IS_LOGIN';
  export const IS_LOGOUT = 'IS_LOGOUT';
  
  /* users */
  export const NEW_USER = 'NEW_USER';
  export const GET_ALL_USERS = 'GET_ALL_USERS';
  export const GET_USER = 'GET_USER';
  export const UPDATE_USER = 'UPDATE_USER';
  export const CREATE_USER = 'CREATE_USER';
  export const DELETE_USER = 'DELETE_USER';
  
  /* roles */
  export const NEW_ROLE = 'NEW_ROLE';
  export const GET_ALL_ROLES = 'GET_ALL_ROLES';
  export const GET_ROLE = 'GET_ROLE';
  export const GET_ROLES_BY_NAME = 'GET_ROLES_BY_NAME';
  export const UPDATE_ROLE = 'UPDATE_ROLE';
  export const CREATE_ROLE = 'CREATE_ROLE';
  export const DELETE_ROLE = 'DELETE_ROLE';
  