Function

Replace the "irc" with the entry of created pass.

(lambda () (auth-source-pass-get 'secret "irc")

Example within a function

(defun run-erc ()
  (interactive)
  (erc-tls :server "chat.sr.ht" ;; this is the soju bouncer of sourcehut
           :port 6697
           :nick "cashmere1337" ;; my libera.chat nick
           :user "cashmere/irc.libera.chat@workstation" ;; username displayed in libera.chat (cashmere)
           :password (lambda () (auth-source-pass-get 'secret "irc"))))
 ;; personal access token