title: Discord bot adding reactions to a message discord.py (no custom emojis)
body: <p>I've been trying to make a bot using discord.py add a reaction to a message using discord.py after reading <a href="https://stackoverflow.com/questions/48982061/how-do-you-have-a-bot-add-a-reaction-using-a-custom-emoji">this</a> (which is not what I wanted because I am not using custom emojis) but it ends up giving this error:</p>
  
  <p><code>discord.ext.commands.errors.CommandInvokeError: Command raised an exception: InvalidArgument: message argument must be a Message</code> </p>
  
  <p>I tried this code</p>
  
  <pre><code>@commands.command(pass_context=True)
  async def emoji(ctx):
      msg = "working"
      await bot.say(msg)
      reactions = ['dart']
      for emoji in reactions: await bot.add_reaction(msg, emoji)
  </code></pre>
  
  <p>Any other related questions here on discord.py are just not helpful for this
  Any ideas on how to implement this</p>