var SSH = require('simple-ssh');

var ssh = new SSH({
host: 'localhost',
user: 'username',
pass: 'password'
});

ssh.exec('echo $PATH', {
    out: function(stdout) {
    console.log(stdout);
}
}).start();

var retreiveData = function ssh.exec('echo $PATH', {
    out: function(stdout) {
    console.log(stdout); // I tried to change it to "return stdout;"
}
}).start();
console.log(retrieveData());