Open ROWebAdmin.ini and add the following under [WebAdmin.WebAdmin]:
AuthenticationClass=WebAdmin.MultiWebAdminAuth
Now you can either add new admin names and passwords from within the Web Admin itself, or you can add them manually in the ROMultiAdmin.ini file.
To do so add the following information for each admin under [Admin MultiAdminData] in ROMultiAdmin.ini
DisplayName= "AdminNameHere" // Punctuation does matter for these names Password= "123" // Any alpha numeric set of characters will work here Order= "DenyAllow" bEnabled= "True" // This enables this admin
