JAVA

null pointer exception during registering user to the firebase

FirebaseUser mFirebaseUser = mAuth.getCurrentUser();
if(mFirebaseUser != null) {
    currentUserID = mFirebaseUser.getUid(); //Do what you need to do with the id
}

null pointer exception during registering user to the firebase

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


	// write this line under onCreate thanks me later
    mAuth = FirebaseAuth.getInstance();

   

}