Span kind to use for user interactions in client-server application ?

[k-rloss]

Hi
I'm instrumenting a client-server application (client is a Java Swing app. Server is a Spring Boot app).

Regarding the spans to track user operations triggered at the UI, what is the span kind that should be used ?
Given that those spans are the entry points to the client layer, should they be set to SpanKind=SERVER ?

Thanks