I’m developing a membership website (using Memberpress) and want to send the login information to some users before the site goes live. I want these specific users to be UNABLE to login BEFORE my launch date. All others users – admins, the client, test users that I create – shouldn’t be blocked from logging in.

What’s the best way to do this?

• Cron job that changes one or more roles of specific users
• some plugin (which I’m not aware of)
• Use ACF to setup a “date” field and run a check on login