API provider — azure.com:azurestack-Product
curl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations/{registrationName}/productscurl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations/{registrationName}/products/{productName}