I'm adding a user through code:

user = new UserInfo();
user.PortalID = portalId;
user.IsSuperUser = false;
user.FirstName = u.Voornaam;
[etc...]
user.Membership = new UserMembership
                    {
                        Approved = true,
                        CreatedDate = System.DateTime.Now,
                        Password = System.Web.Security.Membership.GeneratePassword(8, 1),
                        UpdatePassword = true
                    };
if (UserController.CreateUser(ref user) == UserCreateStatus.Success)
                {
                    // User created successfully
                }


This code works. But it generates a warning that UserMembership is deprecated in dnn5.1 (I'm using dnn7).

I've looked into the source, but I can't figure out what I should use instead.
I believe I need the UserMembership object to supply the password, but its constructor is deprecated??

What is the non-deprecated way of supplying the password?