change

mainRouter.js

router.post('/login', (req, res, next) => {
    var promise = userController.loginControl(req.body);
    promise.then((loginControlResult) => {
        if (loginControlResult.success) {
            res.send({ token: loginControlResult.token, message: loginControlResult.message,success:true });
        }
        else {
            res.send({ message: loginControlResult.message ,success:false});
        }
    });
});