modules/orionode/lib/metastore/mongodb/store.js
function findUser(id, user, callback) {
	if (typeof user.save === 'function') {
		callback(null, user);
	} else {
		orionAccount.findByUsername(id, callback);
	}
}
function findUser(id, user, callback) {
	if (typeof user.save === 'function') {
		callback(null, user);
	} else {
		orionAccount.findByUsername(id, callback);
	}
}
function findUser ( id , user , callback ) { if ( typeof user . save === 'function' ) { callback ( null , user ) ; } else { orionAccount . findByUsername ( id , callback ) ; } }
If `user` has already been fetched from DB, use it, otherwise obtain from findByUsername
If user has already been fetched from DB use it otherwise obtain from findByUsername