How to set Acct-Interim-Interval for all users ?

[John Erickson]

Hello,

How to add the Acct-Interim-Interval attribute for all users ?  I'm using
freeradius 3 on centos 7.

I know that one way is to insert it into the radreply table or the
radgroupreply table.

If possible, where and how to set it for all users in the config files
under /etc/raddb, so I can avoid adding it many times in the mysql tables ?

Thank you.