Not quite sure what you're asking @UU0EZB7M3 -- what do you want to change?

I use google login for this slack. How to swap Gmail accounts for this?

So you want to use a different Gmali account to login to this Slack? i.e., you want an Admin to change the email address associated with your user account here?

yes - i guess

dunno if I can do it myself?

DM me the details of your old and new accounts, and I'll figure out what we need to do to verify ownership for a change of signin email...