Oku is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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I just realised that "TootSuite" was actually a pun.
@BrunoLefevre Cette prise de conscience que tu vient de me faire prendre :o
@Oku Tout ma vision de Mastodon vient de changer d'un coup.