Mini App
📄️ Sequence Diagram Mini App
The Mini App allows merchants to sell their products and services to users through the Hipay Wallet app, enabling users to make direct purchases via the app. 
📄️ Get user TOKEN
Get an access token for the user using the code received from the Hipay Wallet app. The Hipay Wallet app will send a GET request with a code (authorization code) to the merchant's website.
📄️ Get user information
Retrieve the user's information using their access token.