Nextcloud Broadcast Messages for only Admin Users

[Gowtham-eng]

I want to know how to broadcast messages from the talk application and I don’t want the users to send messages in the group only the admin should send a message in the groups. How Can I give permissions so that only the admin can send a message in a talk group conversation? It is quite an emergency for me to know how can we able to achieve this in the talk application. Kindly Help me as quickly as possible.