bug with angular2-meteor app :failed connection to mysql via meteor

i'm trying to connect to mysql database with meteor using nodets:mysql and i'm facing this error :

Unhandled rejection Error: No infromation can be fetched by your database, please check your permissions

this is my part of code :

Meteor.startup(function() {

    //Start of changes

    var connectionSettings = {
        host: '127.0.0.1',
        user: 'root',
        password: '',
        database: 'test'
    };

    var db = Mysql.connect(connectionSettings);
})

Copyright Notice：Content Author:「tawfik medhaffar」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/36205181/bug-with-angular2-meteor-app-failed-connection-to-mysql-via-meteor