RexiMemo includes an account-link flow for Discord. You must already be a member of the official server at discord.gg/K5mKWvaruF.
Open Settings → Connections, enter your Discord username, and start the link request. RexiMemo sends a confirmation request through the Discord service. Web-origin requests expire after 10 minutes and ask you to reply in the verification channel with .rexi approve or .rexi deny.
Only approve a request you started yourself. A Discord account and a RexiMemo account cannot be linked to multiple different accounts at the same time.