Returns the time that has passed since a user created their Twitch account.
This variable takes one optional parameter that is a Twitch username of who to fetch the account age of. Defaults to the sender's username if not provided.
Fossabot created their account 3 years, 6 months, 6 days and 13 hours ago
Aiden created their account 6 years, 9 months, 10 days and 11 hours ago
In case a user cannot be found, or is otherwise unavailable, returns the following:
[Error: User not found.]