first attempt login from DBase

public/index.php

@@ -124,6 +124,12 @@ $app->map(['GET', 'POST'], '/login', function (Request $request, Response $respo
         addFooter($response);
     } else {
         $postdata = $request->getParsedBody();
+
+
+        global $db;
+        $sql = "SELECT * FROM users WHERE username = '" . $postdata['username'] . "' AND password = '" . $postdata['password'] . "';";
+        $ret = $db->query($sql);
+        $rows = $ret->fetchArray();
         if ($postdata['username'] == 'gebruiker' && $postdata['password'] == "abcd") {
             $_SESSION["username"] = $postdata['username'];
             addNavbar($response);