Any way to manipulate ctx?

I’ve a multimethod implementation that checks and verifies JWT auth token from a session cookie. The multimethod accepts ctx and the auth scheme parameters. I would like to manipulate the ctx to set a new session cookie with a new token. But I guess that’s not the correct way to do it.

I feel like I would need something like an “around filter”. Are there any yada gurus willing to help me out on this? Thanks!