Can I login customers from a custom mobile app?

Can I login customers from a custom mobile app?

We're looking into the possibility of using Zoho Creator as the API for an iOS game that we have. In the iOS game the customers need to be able to login using their username/email and password. After a successful login, they should view records that they previously created in Zoho Creator, if there are records that have attachments, they should be downloaded and displayed in the game.

Apparently Zoho Creator doesn't have an API for authenticating customers in third-party apps via HTTP requests.

Is there a work around for this?