Deletes a subscription. If the subscription requires authentication for deletion, only
the owner of the subscription or the topic's owner can unsubscribe, and an Amazon Web Services
signature is required. If the
Unsubscribe call does not require
authentication and the requester is not the subscription owner, a final cancellation
message is delivered to the endpoint, so that the endpoint owner can easily resubscribe
to the topic if the
Unsubscribe request was unintended.
Amazon SQS queue subscriptions require authentication for deletion. Only the owner of the subscription, or the owner of the topic can unsubscribe using the required Amazon Web Services signature.
This action is throttled at 100 transactions per second (TPS).