testpush.js

Parse.Cloud.define("testPush", async (request) => {
    const {params, master, log, headers, ip, functionName} = request;

    let userQuery = new Parse.Query(Parse.User);
    userQuery.equalTo("objectId", params.userId);

    // Find devices associated with these users
    let pushQuery = new Parse.Query(Parse.Installation);
     pushQuery.matchesKeyInQuery('deviceToken', 'deviceToken', userQuery);
    // pushQuery.matchesKeyInQuery('user', userQuery);

    // pushQuery.matchesQuery('user', userQuery);

    console.log('Sending push to user: ' + params.userId);

    Parse.Push.send({
  		where: pushQuery,
  		data: {
			    data: params.dataPush,
    			alert: "Free hotdogs at the Parse concession stand!"
  		}
    }, { useMasterKey: true }).then(function() {
	return true;
  	// Push was successful
    }, function(error) {
	return error;
  	// Handle error
    });

    return true;



});