public void AddNewUser_IfUsenameAlreadyExists_ReturnNegative()
{
string username = "******";
string password = "******";
string gender = "male";
string address = "chandigarh";
string phone = "47657657";
int expectedResult = -1;
int actualResult = obj.AddNewUser(username, password, gender, address, phone);
Assert.AreEqual(expectedResult, actualResult);
}
