Parse Cloud Code for checking if a user has the required role

sample.js

Parse.Cloud.define('isAdmin', function(request, response){
  if(!Parse.User.current()){
    response.error('Request did not have an authenticated user attached with it');
  }
  else {
    userHasRole(request.params.parseSessionToken, 'super') // ex: check if user has "super" role
      .then(function(hasRole){
        if(hasRole){
          response.success({super: true});
        }else{
          response.success({super: false});
        }
      },
      function(error){
        console.error('Request failed: ' + JSON.stringify(error,null,2));
        response.error('Request failed: ' + JSON.stringify(error,null,2));
      });
  }
});

var userHasRole = function(username, rolename) {
  Parse.Cloud.useMasterKey();
  var queryRole = new Parse.Query(Parse.Role);
  queryRole.equalTo('name', rolename);
  return queryRole.first({useMasterKey:true})
    .then(function(roleObject){
      var queryForUsername = roleObject.relation('users').query();
      queryForUsername.equalTo('username', username)
      return queryForUsername.first({useMasterKey:true})
        .then(function(userObject){
          if(userObject){
            console.log(username + ' has role: ' + rolename);
            return Parse.Promise.as(true);
          }
          else{
            console.log(username + ' does not have role: ' + rolename);
            return Parse.Promise.as(false);
          }
        });
    });
}

It would be easier to just create a permission table - add a row with the role when the user is created and then try to read that row with the users session key - no result - no permission.