Hi,
You can achieve such behavior through the Custom Auth feature of the Now4real Premium plan.
In particular, you need to implement JWT authentication.
You have to create 2 different kinds of JWT tokens.
The admin should authenticate with a token containing both view and post rights.
The other users, instead, should authenticate with a token that contains view rights but negates post rights.
This way the admin can post messages (updates or anything else) while other visitors can only view them.
You can find more information here:
https://now4real.com/custom-auth-doc/
Vincenzo
