erc-update-user

erc-update-user is a compiled Lisp function in `erc.el'.

(erc-update-user USER &optional NEW-NICK HOST LOGIN FULL-NAME INFO)

Update user info for USER. USER must be an erc-server-user
struct. Any of NEW-NICK, HOST, LOGIN, FULL-NAME, INFO which are
non-nil and not equal to the existing values for USER are used to
replace the stored values in USER.

If, and only if, a change is made,
`erc-channel-members-changed-hook' is run for each channel for
which USER is a member, and t is returned.