public void DeleteBankAccount()
{
var context = serviceProvider.GetRequiredService <DataContext>();
var controller = new BankAccountsController(context);
context.BankAccount.Add(bankAccount1);
context.SaveChanges();
controller.DeleteBankAccount("18379133");
var bankAccount = controller.GetBankAccountById("18379133").Result.Value;
Assert.Null(bankAccount);
}