title: Hikari Discord bot unable to change own nickname
body: <p>I'm currently trying to make a simple bot to &quot;impersonate&quot; members of a server that say specific words, by having the bot remove their most recent message and changing its own nickname to match that of the member. However, despite the bot having full adminstrator permissions both from its own role and from another one with higher rank, trying to get the bot to change its own nickname always results in a ForbiddenError exception (<code>hikari.errors.ForbiddenError: Forbidden 403: (50013) 'Missing Permissions'</code>)</p>
  <p>The relevant piece of code is just this:</p>
  <pre><code>@plugin.listener(hikari.GuildMessageCreateEvent)
  async def delete_messages(event):
  
  for word in bannedWords:
  [...]
  
  if wordFound:
         
          guild = event.get_guild()
          self = guild.get_my_member()
  
          await self.edit(nickname=&quot;Test&quot;)
  </code></pre>
  <p>Is there anything I can do to fix this? It can change the names of other members just fine, just not its own.</p>