I am aware that GeoServer comes with the feature of 'Configuring HTTP Header Proxy Authentication'. However, I only understand how to customize the 'Header attribute', but the not the 'Header value'.
For example, the "sdf09rt2s: admin":
- Header attribute is 'sdf09rt2s'
- Header value is 'admin'
How can I create more Header value? (such as: 'user1', 'user2', etc)