var query = Account.findOne({username: req.user}).select({'token' : 1});
console.log(query.getQuery());
{ username:
{ _id: 5c9fbd55487df10cf03e24ad,
salt:
'9b261f8e3c9ab4a42fa2661cee2f3f1de52ee2ed1e2a0cdd8a6715607807cf84',
hash:hash'',
username: 'user5688806643',
fio: 'lololol',
token:'token',
__v: 0 } }