Clojurians Log v2

I’m having a hard time wrapping my head around how to update :session data for handling logins. I actually have working code for user registration and user login that works properly but i feel like any example or docs i’m looking up jump from step 1 to step 3 or 4.

for example in this code: https://gist.github.com/chadhs/8798193e3b70b1c08c2427ad59f04f94 i’d love to insert the account-id into the :session :identity key and use that as a basis for access and queries