Verify an Access Token
Now that you have received a client's Access Token it's time to validate it on your server and use it to determine their identity.
Verify & Retrieve Card
Verifying an identity is a two-step process, requiring you to verify the key and then to look up the card for the token.
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Finally, we want to look at how we can refresh our access tokens on the client, given that they are only valid for a limited time.