code: async def _volume(self, ctx, volume: int = None):
          
          player = self.bot.lavalink.players.get(ctx.guild.id)
  
          if not volume:
              return await ctx.send(f'🔈 | {player.volume}%')
  
          await player.set_volume(volume)
          await ctx.send(f'🔈 | Set to {player.volume}%')
docs: Changes the player's volume. Must be between 0 and 150. Error Handling for that is done by Lavalink.