howto give privilege to a user to see history and active connection

[fou fe]

Hi,

I want to  permit some users to see active connections and history. In GUI one 
can give permission to admister sytem , create users ,connection and groups .
How can add this feature ?

I see in table guacamole_user_permission we have READ,UPDATE,ADMISTER,DELETE .

Can you give information to investigate this change.

Thanks