How to get SecurityContext in spring security webflux -

in traditional spring web applications, easy securitycontext securitycontextholder, when used spring-security-webflux(spring security 5.0.o.m3) in spring-webflux application, seems spring security did not store securitycontext securitycontextholder every requests.

or in other words, there easy way current authentication info outside of webhanlder/controllers? wan implement auditoraware interface auditing(auto fills current user) spring data mongodb.