Firebase Callable Function returning nill data - swift

Question

I'm doing firebase auth on the backend and it's working. It's correctly creating the user and I get the UUID in the console log, however when I try to send back the user's UUID I get a nill response. I've already tried all the solutions on other stackoverflow responses and none have worked for me.
This is my firebase callable function.
exports.create_user_auth = functions.https.onCall((data, context)=> {
const email = data.email;
const password = data.password;
return admin.auth().createUser({
email: email,
emailVerified: false,
password: password,
})
.then((userRecord) => {
// response.status(200).send("Successfully created new user: " +userRecord.uid);
console.log(`UserRecord ${userRecord}`)
console.log(`UserRecord ${userRecord.uid}`)
return userRecord.uid
})
.catch((error) => {
// response.status(400).send("Failed to create user: " + error);
return error
});
});
This is my swift code
Functions.functions().httpsCallable("create_user_auth").call(data) { (result, error) in
if result != nil {
print("Result: \(result)")
print("data", result?.data)
let userId = result!.data as? String
print("UserId: \(userId)")
// onSuccess(offerId!)
}
if error != nil {
print("Error: \(error)")
}
}

Answer 1

This is the new working code
exports.create_user_auth = functions.https.onCall(async (data, context)=> {
const email = data.email;
const password = data.password;
var uuid = ""
await admin.auth().createUser({
email: email,
emailVerified: false,
password: password,
})
.then(async (userRecord) => {
// response.status(200).send("Successfully created new user: " +userRecord.uid);
console.log(`NEW UPDATE`)
console.log(`UserRecord ${userRecord}`)
console.log(`UserRecord ${userRecord.uid}`)
uuid = userRecord.uid
// return userRecord.uid
})
.catch((error) => {
// response.status(400).send("Failed to create user: " + error);
return error
});
console.log(`UUID OUTSIDE: ${uuid}`)
return uuid
});