public static InstanceProfileCredentialsProvider getInstance() {
        return INSTANCE;
    }
Returns a singleton {@link InstanceProfileCredentialsProvider} that does not refresh credentials asynchronously.

<p>
See {@link #InstanceProfileCredentialsProvider(boolean)} or {@link #createAsyncRefreshingProvider(boolean)} for
asynchronous credentials refreshing.
</p>
aws-java-sdk-core/src/main/java/com/amazonaws/auth/InstanceProfileCredentialsProvider.java