incorporate a cooldown on the chat command?

[kamborghini]

I have been trying to incorporate a cooldown into the chat command so that I can implement this into my free discord server about learning how to prompt.

This is the .py I have been trying to use. any help would be appreciated.

from discord.ext import commands

bot = commands.Bot(command_prefix='/')

@bot.command(name='chat')
@commands.cooldown(1, 900, commands.BucketType.user)
async def chat_command(ctx):
# Your code here
await ctx.send('Hello!')

@chat_command.error
async def chat_command_error(ctx, error):
if isinstance(error, commands.CommandOnCooldown):
await ctx.send(f'This command is on cooldown. Please wait {error.retry_after:.2f} seconds.')
else:
raise error