Quick enable/disable user account.

Hello, I'm using free radius server 2.1.11 on Linux Enterprise Server 6.1. OS: Linux Enterprise Server 6.1 Radius: free radius server 2.1.11 Database: Mysql Sometime, I need disable a user account in mysql database. And then enable it later on after some check complete. Can you please advise how to toggle such status? There're may be multiple solutions, please advise them all, so I can choose a one most fit the needs. Thanks! Tom