Add SPOTA core PHP application

Add the main admin, dosen, mahasiswa, API, and service code needed to run the core legacy application with configurable upload storage.

admin/page/user/checkuser.php

@@ -0,0 +1,16 @@
+<?php
+session_start();
+include ("../../../inc/helper.php");
+include ("../../../inc/konfigurasi.php");
+include ("../../../inc/db.pdo.class.php");
+
+$db=new dB($dbsetting);
+if($_POST['username']){
+		$db->runQuery("SELECT idAdmin FROM tbadmin WHERE username='".$_POST['username']."' LIMIT 1");
+		if($db->dbRows()>0){
+			echo "false";
+		}else{
+			echo "true";
+		}
+	}
+?>