swift - How do I get Firebase to add new users and not overwrite current users (iOS, Xcode 8)? -

this code keeps overwriting database after new user created. code have put in:

func handleregister () {         guard let email = emailtextfield.text, let password = passwordtextfield.text, let name = nametextfield.text          else {             print("form not valid")             return         }          auth.auth().createuser(withemail: email, password: password, completion: {(user: user?, error) in              if error != nil {                 print(error.self)                  return             }              guard (user?.uid) != nil else {                 return             }         })         let ref = database.database().reference(fromurl: "//firebase link")         let usersreference = ref.child("users").child("uid")         let values = ["name": name, "email": email]          usersreference.updatechildvalues(values, withcompletionblock: { (err, ref) in              if err != nil {                 print(err.self)                 return             }              print("successfully saved user in firebase db")          }         ) 

i feel i'm missing simple. appreciated.

edit: after

guard (user?.uid) != nil else {   return } 

put remaining code below it:

let ref = database.database()... //your code //put inside completion block of create user //the rest of code updatechildvalues 

and use uid parameter child in users

so become:

let usersreference = ref.child("users").child(uid) 

note uid not enclosed double quotes

you have put inside createuser completion block because scope of user?.uid block.