request for a reactive version of org.springframework.session.FindByIndexNameSessionRepository family

[orcloveasagi]

Expected Behavior
Something like org.springframework.session.FindByIndexNameSessionRepository and its subclasses

Current Behavior
We cannot access reactive WebSession by username conveniently.

Context
When I tried to build a Spring cloud gateway application,which build on webflux, with spring security and spring session, I found it difficult to implement concurrent session controle sinces there's no reactive implementations for the FindByIndexNameSessionRepository. However I can still accomplish my goals through ReactiveSessionRepository in a more cumbersome way.
And now I'm going to ask you if you need a more convenient way to access reactive WebSession?
If you do I can package something like FindByIndexNameSessionRepository and make a pr.

[zkning]

+++

[chhch]

Duplicate of #914

[marcusdacoregio]

Closing as duplicate of #914