If I want to hit the Paypal API from my back end, I have to exchange my client id and secret for a temporary access token. How, then, do I only have to provide the client id to the front end SDK? How does the front end SDK make authorized API calls without the secret? ``` <script src="https://www.paypal.com/sdk/js?client-id=YOUR_CLIENT_ID"> // Replace YOUR_CLIENT_ID with your sandbox client ID </script> ``` https://developer.paypal.com/docs/business/checkout/set-up-standard-payments/
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