how to detect the reaction to a message discord py

1#1
2message = ctx.send("text")
3#2
4message = channel.send("text")
5#3
6message = channel.fetch_message(messageid)
7#add reaction to message
8emoji = '\N{THUMBS UP SIGN}'
9await message.add_reaction(emoji)

1emoji = "" # some emoji as a string
2if any(reaction.emoji == emoji for reaction in message.reactions):
3	# there is at least one reaction of the specified emoji

1@client.event
2async def on_message(message):
3    #if the spotify command is triggered
4        #fetch from the API
5        spotifyEmbed = discord.Embed(title=resultName, ...)
6        spotifyEmbed.set_image(url=spotifyImgUrl)
7        spotifyMessage = await message.channel.send(embed=spotifyEmbed)
8        await spotifyMessage.add_reaction("⬅️")
9        await spotifyMessage.add_reaction("➡️")
10
11@client.event
12async def on_reaction_add(reaction, user):
13    if user != client.user:
14        if str(reaction.emoji) == "➡️":
15            #fetch new results from the Spotify API
16            newSearchResult = discord.Embed(...)
17            await reaction.message.edit(embed=newSearchResult)
18        if str(reaction.emoji) == "⬅️":
19            #fetch new results from the Spotify API
20            newSearchResult = discord.Embed(...)
21            await reaction.message.edit(embed=newSearchResult)
22