@Override
    public UnsubscribeResult unsubscribe(UnsubscribeRequest request) {
        request = beforeClientExecution(request);
        return executeUnsubscribe(request);
    }
<p>
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
<code>Unsubscribe</code> 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 <code>Unsubscribe</code> request was unintended.
</p>
<note>
<p>
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.
</p>
</note>
<p>
This action is throttled at 100 transactions per second (TPS).
</p>

@param unsubscribeRequest
       Input for Unsubscribe action.
@return Result of the Unsubscribe operation returned by the service.
@throws InvalidParameterException
        Indicates that a request parameter does not comply with the associated constraints.
@throws InternalErrorException
        Indicates an internal service error.
@throws AuthorizationErrorException
        Indicates that the user has been denied access to the requested resource.
@throws NotFoundException
        Indicates that the requested resource does not exist.
@throws InvalidSecurityException
        The credential signature isn't valid. You must use an HTTPS endpoint and sign your request using
        Signature Version 4.
@sample AmazonSNS.Unsubscribe
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/sns-2010-03-31/Unsubscribe" target="_top">AWS API
     Documentation</a>
aws-java-sdk-sns/src/main/java/com/amazonaws/services/sns/AmazonSNSClient.java