public void CreateUser(string email, string password, string firstName, string lastName, string nationality, string dateOfBirth)
        {
            Helper      h = new Helper();
            string      hashedPassword = Crypto.HashPassword(password);
            TableOfUser user           = new TableOfUser();

            user.email       = email;
            user.password    = hashedPassword;
            user.firstName   = firstName;
            user.lastName    = lastName;
            user.nationality = h.Nationality(nationality);
            user.dateOfBirth = dateOfBirth;
            user.role        = "volunteer";

            _db.TableOfUsers.Add(user);
            _db.SaveChanges();
        }
        public void AddAthlete(string firstName, string lastName, string dateOfBirth, string nationality, string badgeNumber, string photo, string gender)
        {
            Helper      h    = new Helper();
            TableOfUser user = new TableOfUser();

            user.firstName   = firstName;
            user.lastName    = lastName;
            user.dateOfBirth = dateOfBirth;
            string hashPass = Crypto.HashPassword(dateOfBirth);

            user.password    = hashPass;
            user.nationality = h.Nationality(nationality);
            user.badgeNumber = badgeNumber;
            user.photo       = photo;
            user.gender      = gender;
            user.role        = "athlete";
            _db.TableOfUsers.Add(user);
            _db.SaveChanges();
        }