Hi! I'm currently working on developing a software that offers personalized checkouts for Shopify. I'm using Shopify Admin Apps to accomplish this. However, I'm facing difficulties in figuring out the next steps to integrate my custom "page checkout" into Shopify.
Here's a brief overview of how the app works: Users will create a Shopify admin app and share their credentials with my application. In the backend, I'll customize their checkout experience. My question is, what steps should I follow to achieve this?