Login to access JSON Feed on a web page

Hello,

I am using Zoho Creator as a database to store information which will be mapped on a Google Map. The user inputs data through a Form, including latitude and longitude values, which are accessed in my Google Maps site through a JSON feed of the View. Everything works great with a public application. I need to make the application private, and still have access to the JSON feed. If I could include a simple login form on the map site, this would work. I can embed an iframe of a dummy form which will prompt the user for a login, but the form takes up a lot of needed space on the map site. Any ideas on how to make this work any better? Can you access the login via the API? For some reason a private JSON feed link will not work on the map, but I would prefer to have a login anyway.

Thanks and Zoho Creator is great!