Is-User
#An utility to check if a role is assigned to an user.
#How to use
const isUser = require('is-user');
export.update = function(req, res){
//chaching the roles for future use in this function"
const userArr = ['user', 'admin', 'manager', 'superadmin', 'ceo'];
isUser.cache(userArr);
let isAdmin = isUser.is('admin'); //true
let isManager = isUser.is('manager'); //true
}