A fully managed end-to-end service for digitally signing code, documents, and applications. (formerly Trusted Signing)
Sign in to portal.azure.com using the Microsoft account you registered with. Type Cost Management + Billing into the top search bar and select it, or click the hamburger menu in the top-left corner and choose Cost Management + Billing.
Select Payment methods from the left-hand menu, or scroll down the main billing page to find Credits remaining. Click View details or navigate to the Azure credits tab to see the full breakdown, including the original $200 credit amount, available or remaining balance, and effective and expiration dates. The free trial credit is valid for 30 days.
You might want to check this as well - youtube.com/watch?v=0ewgNWH4tDY&t=19
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hth
Marcin