You have some event somewhere that initializes the whole app-db and kicks off the app. You can dispatch that event not on the render but on the auth token reception.

I’m using async flow https://github.com/day8/re-frame-async-flow-fx for something similar, maybe it helps

Don’t use async flow for this. The least horrible solution I have found is to use promesa at app bootup to make your initial app-db

(p/let [auth-response (... make request to get token ...)]
  (let [initial-db {:auth-token (... auth-response ...)}]
    (rf/dispatch-sync [:init initial-db])))

i use the same approach as emccue.

Thank you everyone.