title: discord.Guild.get_member() No value for argument 'self' in unbound method call discord.py
body: <p>I'm creating a discord reaction bot which assigns members roles depending on which reaction emoji they use.</p>
  <p>I've found <code>discord.utils.find</code> works as expected when running the app locally, but doesn't find a member when the app is hosted on Heroku or ibmcloud.</p>
  <pre><code>@client.event
  async def on_raw_reaction_remove(payload):
      message_id = payload.message_id
       #...
       #...
       #...
          # payload.member is not available for REACTION_REMOVE event type
          member = discord.utils.find(lambda m: m.id == payload.user_id, guild.members)
         
          member2id = int(payload.user_id)
          GetMember = discord.Guild.get_member()
          RoleLoser = GetMember(member2id)
  </code></pre>
  <p>To get around this I'm trying to search the member list for a given guild and return a member using their member id. But running the above prompts the following with reference to this line <code>GetMember = discord.Guild.get_member()</code></p>
  <pre><code>No value for argument 'self' in unbound method call
  No value for argument 'user_id' in unbound method call
  </code></pre>
  <p>Really appreciate any help!</p>