You need to access data from the user claim object in the e-commerce web app.

Write custom code to make a Microsoft Graph API call from the e-commerce web app.

Assign the Contributor RBAC role to the e-commerce web app by using the Resource Manager create role assignment API.

Update the e-commerce web app to read the HTTP request header values.

Using the Azure CLI, enable Cross-origin resource sharing (CORS) from the e-commerce checkout API to the e-commerce web app.