Users
To use the Security API you must add the following using statements:
    using Telerik.Sitefinity.Security; 
    using Telerik.Sitefinity.Security.Model; 
To manage users, you use the Telerik.Sitefinity.Security.UserManager class and the Telerik.Sitefinity.Security.UserProfileManager. To get an instance of the manager, use the following code: