Admin.findOne({username: req.body.username}).then(user => {
            if (!user) return next(new errors.NotFoundError(`User ${req.body.username} not found`))

            return new Promise((resolve, reject) => {
                crypto.randomBytes(4, (err, buffer) => {
                    if(err) return reject(err);

                    let password = buffer.toString('hex');
                    console.log(password);
                    resolve({user, password});
                });
            });
        }).then(({user, password}) => {
            return new Promise((resolve, reject) => {
                user.setPassword(password, (err) => {
                    if(err) reject(err);
                    resolve({user, password});
                });
            });
        }).then(({user, password}) => {
            user.save((err) => {
                if(err) throw err;
            });
            console.log(password);
        })
        .then(res.sendStatus(204))
        .catch(next);