private URI getRequestUri() {
        return URI.create(String.format("%s%s/", REQUEST_PROTOCOL, clusterName));
    }
Source of implementation <a href="https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/auth-iam.html#auth-iam-Connecting">
    Authenticating with IAM</a>.
storage/src/main/java/com/epam/aidial/core/storage/cache/IamAuthTokenRequest.java