Discord.py slash command

I made a function that echoes a text with classic commands. I wanted to make it with the slash command, but it didn't work. Honestly, I was confused, and the discord.py documentation wasn't precise about many things.

In my code, the first two arguments are reserved for channels and time.

The bot will check if the two arguments are provided. If one or both are not, it will ignore them. This is for the channel:

async def echo(ctx, *args):
#If a command is not followed with a text
if not args:
    await ctx.send("Please provide some text for me to echo dummy.")
    return

#Channel mention
if args[0].startswith("<#") and args[0].endswith(">"):
    channel_id = int(args[0][2:-1])
    channel = client.get_channel(channel_id)

    #If the channel is not valid or doesn't exist
    if not channel:
        await ctx.send("Invalid channel mention.")
        return

    args = args[1:]
else:
    channel = ctx.channel

The rest of the code is for the time argument:

#Check if there is a time argument
time_match = re.match(r"(\d+)(h|m)", args[0])
if time_match:
    time_delta = timedelta(hours=int(time_match.group(1))) if time_match.group(2) == "h" else timedelta(minutes=int(time_match.group(1)))
    await ctx.send(f"I will echo the message in {time_delta}.")
    await asyncio.sleep(time_delta.total_seconds())

    args = args[1:]
else:
    time_delta = timedelta()

message = " ".join(args)
await channel.send(message)

I found that converting those will require a lot of understanding, and I am a beginner at python.

source https://stackoverflow.com/questions/75415695/discord-py-slash-command