Discord.py add reaction to a users message

Question

#reaction ✅
@bot.event
async def on_message(message):
    if message.content.startswith('!on'):
        await message.add_reaction('✅')
    if message.content.startswith('!off'):
        await message.add_reaction('✅')

I have a problem with discord.py adding a reaction to a message. I have done it so it car react to the message but I cant excecute any other command