Sends you the bot invite link.

async def join(self, ctx):
        """Sends you the bot invite link."""
        perms = discord.Permissions.none()
        perms.read_messages = True
        perms.send_messages = True
        perms.manage_messages = True
        perms.embed_links = True
        perms.read_message_history = True
        perms.attach_files = True
        perms.add_reactions = True
        await self.bot.send_message(ctx.message.author, discord.utils.oauth_url(self.bot.client_id, perms))