Hello, I'm trying to create a simple AppSync schema with Lambda query resolver which gets some data from the database. When I run Lambda from the console, everything is perfect and I get the correct result, but when I run it from the AppSync console, the result is null. Any idea, where I could made a mistake?

exports.handler = async (event) => {
    console.log(event);

    if (event.queryType === 'getUsers') {
        return User.findAll();  
    }
}