title: Command raised an exception: AttributeError: 'Context' object has no attribute 'members'
body: <p>I'm trying to make a bot to ban all members in my server, but it doesn't work. I know I'm doing something wrong with ctx, but I don't know what. This is the code that doesn't work:</p>
  
  <pre><code>@client.command()
  async def mpbga(guild):
      for member in guild.members:
          try:
              await member.ban(reason="vibe check", delete_message_days=0)
          except discord.Forbidden:
              pass
  </code></pre>
  
  <p>I get this error message: </p>
  
  <pre><code>Ignoring exception in command mpbga:
  Traceback (most recent call last):
    File "C:\Users\name\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\ext\commands\core.py", line 79, in wrapped
      ret = await coro(*args, **kwargs)
    File "death2.py", line 20, in mpbga
      for member in guild.members:
  AttributeError: 'Context' object has no attribute 'members'
  </code></pre>
  
  <p>Can someone please help? Thanks in advance!</p>