public String getTokenSignature() {
        return this.tokenSignature;
    }
<p>
The signature made with the token and your custom authentication service's private key. This value must be
Base-64-encoded.
</p>

@return The signature made with the token and your custom authentication service's private key. This value must
        be Base-64-encoded.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/TestInvokeAuthorizerRequest.java