protected override void OnModelCreating(ModelBuilder modelBuilder)
{
//Composite Key
modelBuilder.Entity <PassengerRegistration>()
.HasKey(o => new { o.ID, o.PassengerID });
modelBuilder.Entity <DriverRegistration>()
.HasKey(o => new { o.ID, o.DriverID });
CountryName countryName = new CountryName();
countryName.CountryNameData(modelBuilder);
StateName stateName = new StateName();
stateName.StateNameData(modelBuilder);
DistrictName districtName = new DistrictName();
districtName.DistrictNameData(modelBuilder);
}