title: Adding reactions to a message. Discord.py rewrite
body: <p>I'm trying to add a reaction to a message with a custom emoji, for some reason I can't find much online regarding this and I've spent the last 30m trying to figure out different approaches. Nothing's worked so far.</p>
  
  <p>This is inside the cog.</p>
  
  <p>1st approach</p>
  
  <pre class="lang-py prettyprint-override"><code>accept_decline = await ctx.send("Test")
  cross = self.bot.get_emoji(558322190060093441)
  checkM = self.bot.get_emoji(558322116685070378)
  await accept_decline.add_reaction(checkM)
  await accept_decline.add_reaction(cross)
  </code></pre>
  
  <p>Another approach</p>
  
  <pre><code>accept_decline = await ctx.send("Test")
  await self.bot.add_reaction(accept_decline, emoji="&lt;:greenCheckmark:558322116685070378&gt;")
  await self.bot.add_reaction(accept_decline, emoji="&lt;:redCross:423541694600970243&gt;")
  </code></pre>
  
  <p>Nothing seems to happen nor do anything errors appear in the console.</p>