protected override void OnModelCreating(ModelBuilder builder)
{
base.OnModelCreating(builder);
NpgsqlModelBuilderExtensions.UseHiLo(builder);
builder.Entity <IdentityUser <long> >().ToTable("User");
builder.Entity <IdentityRole <long> >().ToTable("Role");
builder.Entity <IdentityUserClaim <long> >().ToTable("UserClaim");
builder.Entity <IdentityRoleClaim <long> >().ToTable("RoleClaim");
builder.Entity <IdentityUserLogin <long> >().ToTable("UserLogin");
builder.Entity <IdentityUserRole <long> >().ToTable("UserRole");
builder.Entity <IdentityUserToken <long> >().ToTable("UserToken");
}