When any user wants to update his/her password from app, i want to update that password of same FCM user and for that i have tried below code which define in official doc.
here is the screenshot of that 
Here is my code
func authenticateAndUpdateFCMUserPassword(strNewPassword: String) { let user = Auth.auth().currentUser var credential: AuthCredential // Prompt the user to re-provide their sign-in credentials user?.reauthenticate(with: credential) { error in if let error = error { // An error happened. } else { // User re-authenticated. } } Auth.auth().currentUser?.updatePassword(to: strNewPassword) { (error) in if error != nil { print("Error occur while updating password") } else { print("Password Updated Successfully") } } } But in above code i'm facing below error at user?.reauthenticate line
Cannot convert value of type '(_) -> ()' to expected argument type 'AuthDataResultCallback?' (aka 'Optional<(Optional, Optional) -> ()>')
so i re write that by below code
user?.reauthenticate(with: credential, completion: { (dataResult, errorr) in if errorr != nil { // An error happened. } else { // User re-authenticated. } }) but in above code i'm facing below error
Variable 'credential' used before being initialized
credential is defined only once and never used before this
will anyone please let me know what i'm doing wrong?
