public void Up(IDatabase db)
 {
     db.OnTable("User")
         .AddNotNullableColumn("Email", DbType.StringFixedLength).OfSize(255).HavingDefault("")
         .AddNotNullableColumn("Password", DbType.String).HavingDefault("");
 }
 public void Down(IDatabase db)
 {
     db.OnTable("User")
         .DropColumn("Email")
         .DropColumn("Password");
 }