Asana | Update custom fields of a task when using Zapier code

asana-zapier-update-task-custom-fields.js

// this is wrapped in an `async` function
// you can use await throughout the function
var adCampaign = inputData.adCampaign; // get the variable from the adCampaign
var adKeyword = inputData.adKeyword; // get the variable from the adKeyword
var taskID = inputData.taskID; // get the variable from the taskID
var finalAdKeyword = "";

if ( (adKeyword == 'None') || (adKeyword == 'No Terms') || (adKeyword == '[channeldrilldown3]')) {
	var finalAdKeyword = "";
}
else {
	var finalAdKeyword = adKeyword ;
}

let body = {
	"data": {
		"custom_fields": {
			"235235623623": adCampaign, // Ad Campaign field and value
			"723237233322": finalAdKeyword // Ad Keyword field and value
		}
	}
};
// find the task based on the taskID
const res = await fetch('https://app.asana.com/api/1.0/tasks/' + taskID, {
	method: 'PUT',
	headers: {
		'Authorization': 'Bearer 1/XXXXXXXXX'
	},
	body: JSON.stringify(body)
});
const data = await res.json();
output = {data: data};