protected function do_delete()
 {
     parse_str(file_get_contents("php://input"), $_DELETE);
     if (empty($_DELETE["student_id"])) {
         $this->exit_error(400, "studentIDMandatoryAndNotEmpty");
     } else {
         if (empty($_DELETE["team_id"])) {
             $this->exit_error(400, "teamIDMandatoryAndNotEmpty");
         } else {
             $student_id = $_DELETE["student_id"];
             $team_id = $_DELETE["team_id"];
             TeamModel::removeStudentFromTeam($student_id, $team_id);
         }
     }
 }