var mysql = require('mysql');
var connection = mysql.createConnection(
    {
      host     : 'hackteams.c6p7kpyzcymg.us-east-1.rds.amazonaws.com',
      user     : 'test',
      password : 'password',
      database : 'hackteams'
    }
);

// username:
var user = 'tiger';

connection.query("SELECT * FROM users WHERE (id = (SELECT friend_id FROM user_has_friend WHERE (user_id = (SELECT id FROM users WHERE username = '" + user + "'))))", function(err, rows, field) {
	if (err) callback(err, null);
	for (i in rows) {
		// do something...
		console.log(rows[i]);
	}
	connection.end();
});