Create a new admin user in umbraco

CreateNewAdminUser

/// ApplicationBase: prior to 4.8
public class AdminUserPwdReset : ApplicationBase //: ApplicationStartupHandler
{
    public AdminUserPwdReset()
    {
        var userTYpe = UserType.GetUserType(1); // admins
        User adminUser = User.MakeNew("damiaan", "damiaan", hashPassword("default"), userTYpe);
        adminUser.addApplication("users");
        adminUser.addApplication("settings");
        adminUser.addApplication("developer");
        adminUser.addApplication("media");
        adminUser.addApplication("content");
        adminUser.Save();
    }
    string hashPassword(string password)
    {
        HMACSHA1 hash = new HMACSHA1();
        hash.Key = Encoding.Unicode.GetBytes(password);

        string encodedPassword = Convert.ToBase64String(hash.ComputeHash(Encoding.Unicode.GetBytes(password)));
        return encodedPassword;
    }
}