How to use the at argument in queue?

[satrio-yudhoatmojo]

Hi, there's an at argument in the queue function and I believe it is used for setting the time the producer is sent to the server, but how do I use this? What is its value type?

from Client.py:
def queue( self, task: str, args: typing.Iterable = None, queue: str = "default", priority: int = 5, jid: str = None, custom=None, reserve_for=None, at=None, retry=5, backtrace=0, )

[cdrx]

It should be a string, in the format noted here:

https://github.com/contribsys/faktory/wiki/The-Job-Payload#options