private static void Seed(BillsPaymentSystemContext db)
        {
            using (db)
            {
                var user = new User()
                {
                    FirstName = "Pesho",
                    LastName  = "Peshov",
                    Email     = "*****@*****.**",
                    Password  = "******"
                };

                var creditCards = new CreditCard[]
                {
                    new CreditCard()
                    {
                        ExpirationDate = DateTime.ParseExact("20.05.2020", "dd.MM.yyyy", null),
                        Limit          = 1000m,
                        MoneyOwed      = 5m
                    },
                    new CreditCard()
                    {
                        ExpirationDate = DateTime.ParseExact("21.05.2020", "dd.MM.yyyy", null),
                        Limit          = 400m,
                        MoneyOwed      = 200m
                    }
                };

                var bankAccount = new BankAccount()
                {
                    Balance   = 1500m,
                    BankName  = "Swiss Bank",
                    SwiftCode = "SWSSBANK"
                };

                var paymentMethods = new PaymentMethod[]
                {
                    new PaymentMethod()
                    {
                        User       = user,
                        CreditCard = creditCards[0],
                        Type       = PaymentMethodType.CreditCard
                    },
                    new PaymentMethod()
                    {
                        User       = user,
                        CreditCard = creditCards[1],
                        Type       = PaymentMethodType.CreditCard
                    },
                    new PaymentMethod()
                    {
                        User        = user,
                        BankAccount = bankAccount,
                        Type        = PaymentMethodType.BankAccount
                    }
                };

                db.Users.Add(user);
                db.CreditCards.AddRange(creditCards);
                db.BankAccounts.Add(bankAccount);
                db.PaymentMethods.AddRange(paymentMethods);

                db.SaveChanges();
            }
        }
        private static void Seed(BillsPaymentSystemContext context)
        {
            var users = new[]
            {
                new User
                {
                    FirstName = "Anton",
                    LastName  = "Apostolov",
                    Password  = "******",
                    Email     = "*****@*****.**"
                },
                new User
                {
                    FirstName = "Zornitsa",
                    LastName  = "Orlova",
                    Password  = "******",
                    Email     = "*****@*****.**"
                },
                new User
                {
                    FirstName = "Kaloyan",
                    LastName  = "Minchev",
                    Password  = "******",
                    Email     = "*****@*****.**"
                }
            };

            var creditCards = new[]
            {
                new CreditCard
                (
                    600,
                    230.18m,
                    new DateTime(2019, 11, 30)
                ),
                new CreditCard
                (
                    900,
                    0,
                    new DateTime(2018, 10, 31)
                ),
                new CreditCard
                (
                    3200,
                    120.35m,
                    new DateTime(2020, 05, 31)
                ),
                new CreditCard
                (
                    50000,
                    0,
                    new DateTime(2029, 01, 31)
                )
            };

            var bankAccounts = new[]
            {
                new BankAccount
                (
                    301.18m,
                    "First Investment Bank",
                    "FINVBGSFXXX"
                ),
                new BankAccount
                (
                    540329.85m,
                    "Banque Cantonale De Geneve",
                    "BCGECHGGXXX"
                )
            };

            var paymentMethods = new[]
            {
                new PaymentMethod
                {
                    User       = users[0],
                    Type       = PaymentMethodType.CreditCard,
                    CreditCard = creditCards[0]
                },
                new PaymentMethod
                {
                    User        = users[0],
                    Type        = PaymentMethodType.BankAccount,
                    BankAccount = bankAccounts[0]
                },
                new PaymentMethod
                {
                    User       = users[1],
                    Type       = PaymentMethodType.CreditCard,
                    CreditCard = creditCards[1]
                },
                new PaymentMethod
                {
                    User       = users[1],
                    Type       = PaymentMethodType.CreditCard,
                    CreditCard = creditCards[2]
                },
                new PaymentMethod
                {
                    User        = users[2],
                    Type        = PaymentMethodType.BankAccount,
                    BankAccount = bankAccounts[1]
                },
                new PaymentMethod()
                {
                    User       = users[2],
                    Type       = PaymentMethodType.CreditCard,
                    CreditCard = creditCards[3]
                }
            };

            context.PaymentMethods.AddRange(paymentMethods);

            context.SaveChanges();
        }