How to update user information on Parse.com in Android?

I am trying to update user information on parse.com and it worked fine once and it doesn't work anymore. I do not know why.

Here is my code.

ParseUser pu = ParseUser.getCurrentUser();
String userID = pu.getObjectId();

ParseQuery<ParseUser> query = ParseUser.getQuery();
query.getInBackground(userID, new GetCallback<ParseUser>() {
    @Override
    public void done(ParseUser parseUser, ParseException e) {
        if (e == null) {
            String playerName= displayNameEditText.getText().toString();
            parseUser.put("playerName", playerName);
            String teamName= emailEditText.getText().toString();
            parseUser.put("teamName", teamName);
            String phone = phoneEditText.getText().toString();
            parseUser.put("phone", phone);


            parseUser.saveInBackground();
        }

    }
});

      

        
        
        
      

    

Any suggestions?