}//O(1)
public DBhandler(string host, string username, string password, string DB) //connection to other postgresql
{
this.con = new NpgsqlConnection(String.Format("Server={0};Username={1};Database={2};Password={3};SSLMode=Prefer", host, username, DB, password));
this.con.Open();
this.sort = new Sorts();
}//O(1)
//constructors:
public DBhandler()
{
this.con = new NpgsqlConnection("secret");
this.con.Open();
this.sort = new Sorts();
}//O(1)
