MOTD on cli

Please provide details on the following items. Failure to do so may result in deletion of your feature request.

What's the user value of this feature request?
A clear and concise description of what the user value is.

It'd be great for an admin to be able to send messages to users when they perform actions. Things like scheduled downtime or maintenance windows.

Who is the functionality for?
Who will use this feature?

admins and end users

How often will this functionality be used by the user?
How often will they use this feature?

daily? depends on when you have updates

Who else is affected by the change?
Does this feature cause a breaking change? Are other users affected by this change?

I don't think this would interfere with anything?

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.