Error handling

[mmcmd]

Add error handling for multiple exceptions such as command still on cooldown and missing args

[vcidst]

How to implement this? I see an is_on_cooldown() function in the API. Will that need to be added to the beginning of every async function?

[mmcmd]

I believe it is possible to create a global cooldown function, though I'm not 100% sure. The discord.py discord may have some examples on it