title: addRole to a mentioned user isn't working
body: <p>I'm trying to make a discord bot, which can add a specific role to an user.</p>
  
  <pre><code>const Discord = require('discord.js');
  const client = new Discord.Client();
  client.on('ready', () =&gt; {
    console.log(`Logged in as ${client.user.tag}!`);
  });
  
  client.on('message', (message) =&gt; {
      let allowedRole = message.guild.channels.find(channel =&gt; channel.name === "Streamer");
      let gRole = message.guild.channels.find(channel =&gt; channel.name === "Stream 1");
      mention = message.mentions.users.first();
      let member = message.mentions.users.first();
    if (message.content === "addRole") {
        members.get(message.mentions.user.id).addRole(gRole);
    }
  });
  
  client.login('mytoken');
  </code></pre>
  
  <p>I expect that the bot can add role to a specific person</p>