why this code fail to sign up on firebase? - firebase

Question

For some reason this code fail to sign up on firebase,
app.post('/signup', (req, res) => {
const newUser = {
email: req.body.email,
password: req.body.password,
confirmPassword: req.body.confirmPassword,
handle: req.body.handle
}
let token, userId;
db.doc(`/users/${newUser.handle}`).get().then(doc => {
if (doc.exists) {
return res.status(400).json({ handle: 'this handle already exists' })
} else {
return firebase.auth().createUserWithEmailAndPassword(newUser.email, newUser.password)
}
})
.then(data => {
userId = data.user.uid;
return data.user.getIdToken();
})
.then(idToken => {
token = idToken;
const userCredentials = {
handle: newUser.handle,
email: newUser.email,
createdAt: new date().toISOString(),
userId
}
return db.doc(`/users/${newUser.handle}`).set(userCredentials)
})
.then(() => {
return res.status(201).json({ token });
})
.catch(err => {
if (err.code === "auth/email-already-in-use") {
return res.status(400).json({ email: 'Email is alrready in use' })
} else {
return res.status(500).json({ general: 'something went wrong, please try again' })
}
})
});
I always get { general: 'something went wrong, please try again' } , i am using postman to mimic the request to firebase,
This code works perfectly:
firebase.auth().createUserWithEmailAndPassword(newUser.email, newUser.password)
.then(data => {
return data.user.getIdToken();
})
.then(token => {
return res.status(201).json({token})
})
.catch(err => {
console.error(err);
return res.status(500).json({error: 'something went wrongly'})
})
The first trial is from a tutorial i am following in Youtube and sadly it doesn't work

Answer 1

On the backend, you can use Firebase Admin SDK to get details about any user but it does not have any ability to login on behalf of user.