var API = Spark.getGameDataService();

        //Create a query, in this example we want to find a user with a unique userName

        var query = API.S("userName").eq(email);

        //Run query on userDetails collection

        var resultOBJ = API.queryItems("userDetails", query);

        var eee = resultOBJ.error();

        var ccc = resultOBJ.cursor();

        //If our query is successful

        if(resultOBJ.error() != null)

        {

        } 

        if(resultOBJ.error() !== null)

        {

        }

        if(resultOBJ.cursor().hasNext())

        {

            //Get playerID which is set as the entry ID and load player

            var player = Spark.loadPlayer(resultOBJ.cursor().next().getId());    

        }

When searching for userName that does not exist in the player collection, 

This line... Crashes...

 --> if(resultOBJ.cursor().hasNext())

When trying to get error() to verify if the userName exists, error returns null

How can I know if user does not exist...