I have built an Opencart website and this website needs to be accessed through a link inside a different application. Here is how it should work.
1. Link to my website is embedded in the client application.
2. User logs into the client application and clicks on the link to my site.
3. Since the User is already logged in, his Username, email id and other details will be passed by URL encoding.
4. On the Opencart side, this Username and other details have to be stored.