SwiftUI - Update password on Firebase

Question

I'm trying to be able to update at my password on Firebase, but it's not working yet. Hope you can help me to solve this problem

Form

struct ChangePassword: View {
    @State var oldPassword: String = ""
    @State var newPassword: String = ""
    @State var confirmPassword : String = ""
    @ObservedObject var loginViewModel = LoginViewModel()
    var body: some View {
       ZStack {
        VStack {
            HStack {
                Text("Old Pw")
                    .poppinsRegularFont(size: 17)
                    .foregroundColor(Color(#colorLiteral(red: 0, green: 0, blue: 0, alpha: 1))).opacity(1)
                SecureField("", text: $oldPassword)
                    .padding()
                    .font(Font.system(size: 15, weight: .medium, design: .serif))
                    .frame(width: UIScreen.main.bounds.width - 80,height: 48)
                    .background(
                        Color.black.opacity(0.1)
                    )
            }
            .padding(.bottom,20)
            HStack {
                Text("New Pw")
                    .poppinsRegularFont(size: 17)
                    .foregroundColor(Color(#colorLiteral(red: 0, green: 0, blue: 0, alpha: 1))).opacity(1)
                SecureField("", text: $newPassword)
                    .padding()
                    .font(Font.system(size: 15, weight: .medium, design: .serif))
                    .background(
                        Color.black.opacity(0.1)
                    )
            }
            .padding(.bottom,20)
            HStack {
                Text("Confirm Pw")
                    .poppinsRegularFont(size: 17)
                    .foregroundColor(Color(#colorLiteral(red: 0, green: 0, blue: 0, alpha: 1))).opacity(1)
                SecureField("", text: $confirmPassword)
                    .padding()
                    .font(Font.system(size: 15, weight: .medium, design: .serif))
                    .background(
                        Color.black.opacity(0.1)
                    )
            }
            
            Button(action: {
                loginViewModel.updatePassword(password: confirmPassword)
            }) {
                Text("Save")
            }
        }
       }
    }
}

func UpdatePassword

class LoginViewModel: ObservableObject {
 let userPassword = Auth.auth().currentUser
    var credential: AuthCredential?
    
    func updatePassword(password: String) {
        if let credential = credential {
            userPassword?.reauthenticate(with: credential ) { error,_  in
                if error != nil {
                // An error happened.
              } else {
                Auth.auth().currentUser?.updatePassword(to: password) { (error) in
                  // ...
                }
              }
            }
        }
    }
}

I'm trying to be able to update at my password on Firebase, but it's not working yet. Hope you can help me to solve this problem...................................

Answer 1

let user = Auth.auth().currentUser

    let credential = EmailAuthProvider.credential(withEmail: user!.email!, password: currentPassword)

    user?.reauthenticate(with: credential, completion: { (authResult, error) in
       if let error = error {
          // Handle re-authentication error
          return
       }
       user?.updatePassword(to: newPassword, completion: { (error) in
          if let error = error {
             // Handle password update error
             return
          }
          // Password update successful
       })
    })

Answer 2

You don't need to reauthenticate user, please write below code

Auth.auth().currentUser?.updatePassword(to: newPasswordTF.text!) { (error) in
            if let error = error as NSError? {
                
            }
            // Password change sucussfully
            

          // ...
        }