//crendenciais por http GET
//username = HugoAbreu || COLDTECH/HugoAbreu

string _username = _Context.Request.QueryString["username"];
string _password = _Context.Request.QueryString["password"];

SqlConnection con = new SqlConnection();
con.ConnectionString = "Data Source = 10.1.2.3; Initial Catalog = SIG_20171005; Persist Security Info = False; Integrated Security = false;User Id=" + _username + "; password= " + _password + ";";
con.Open();