Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.
A unique key for making the request idempotent. Must match pattern: ^[a-zA-Z0-9\-_:\.]+$. See Idempotent Requests for more details.
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Unique identifier of the subscription
"sub_fooBOwYsaK50AEfK"
Cancel Subscription response