Using Zoho CRM Data to Populate Zoho Creator Look up Field

Using Zoho CRM Data to Populate Zoho Creator Look up Field

I'm building a simple Creator app to create invoices for our small business.

All my customer and supplier details are stored in Zoho CRM.

Rather than set up a form to duplicate all my supplier/customer records (which I need to produce the HTML View invoice), I would like to be able to access the Zoho CRM customer / supplier data directly in Creator - ideally by using a look up field to view all customers and suppliers names, and then using the selected customer/supplier name to pre-populate the address details in the invoice.

I'm pretty sure I need to be using the Zoho CRM API, but I'm new to API programming and I need some help.

If anyone can tell if this idea is possible and give a few pointers, that would be great.

Many thanks.