Sorry. It is more complex. Here is the documentation for EXOS 16.1 = https://documentation.extremenetworks.com/exos_16.1/downloads/GUID-D14940D6-7F4E-4084-A9BD-069AA223D632.pdf What you need is the Security section, pages 951+
In general you need to authenticate the user through Radius with Extreme-CLI-Authorization = enabled. then you will receive each command through radius request and Access-accept means the command can be executed. Access-reject means the command execution is rejected.