Direct Message notifications slack

[grumpasaurus]

So far all the add-ons that I've found only support notifications sent to a pre-set channel in Slack.  

Is there any plugin where, in lieu of an email, send a direct message as a pre-set User/Bot directly to someone?  This would be useful when doing @ mentions directly at people.

[Nic Brough -Adaptavist-]

How did you set up the recurring task in the first place?