Creates a new user. If CanCreateUsers is false then this should throw an exception when called. The user manager is expected to modify the record passed in to set IsPersisted to true and to fill in the unique ID.

void CreateUser(
	IUser user
)

Sub CreateUser ( 
	user As IUser
)

void CreateUser(
	IUser^ user
)

abstract CreateUser : 
        user : IUser -> unit