How to return a value from an asynchronous function?

Question

JavaScript

There is a function

function authcheck(from_id,first_name){
  conn.query("SELECT * FROM `users` WHERE `id` = '"+from_id+"'", function(err, results) {
      if (err){
          console.log(err); return false;}
      var result = JSON.parse(JSON.stringify(results));
      if ( result[0] === undefined ){
        conn.query("INSERT INTO `users` (`id`,`name`,`balance`) VALUES ('"+from_id+"','"+first_name+"','0');", function(err, results){
          if (err){
              console.log(err); return false; }
          return 'unf';
        });
        return false;
      }else{
        return ['jopa']
      }


  });
}

But no values ​​are returned from it. How to be?