Express server stops without throwing error - angularjs

Question

I am using the angular fullstack generator, but I do not believe this is the problem. I am working with Stripe.js and trying to save the data to the SQLite database using Sequelize. I have tried many different things, but the server stops running when it gets to the part where it is supposed to save the data.
app.post('/register', auth.isAuthenticated(), function(req,res){
console.log('access: ',req.query)
var userId = req.body._id
var data = req.body.data
//create stripe acct for artists
stripe.accounts.create(data, function(err,acct){
if(err){
console.log('err!!! ', err)
} else {
console.log('acct: ', acct)
//look for user in database
db.User.find({
where: {
_id: userId
}
})
.then(function(user) {
if(user){
console.log('user: ', user)
//add stripe acct info to db
console.log('acct:', user.dataValues.account);
/*this is where the Server stops running*/
user.updateAttributes({
account: JSON.stringify(acct)
}).success(function(){
console.log('newacct:', user.dataValues.account);
//just to see if it works
res.send({'account': acct});
})
} else {
console.log('no user found bruh')
}
});
}
})
})
I have tried redirecting, changing req.method to 'get' and then res.redirect. res.end() all of the above, but it always stops running. No errors are thrown it just simply says 'Stopping Express Server'. Thanks in advance for the help!