Added database queries during login flow

public/lucidAuth.validateRequest.php

@@ -35,7 +35,10 @@
 		header("HTTP/1.1 202 Accepted");
 		exit;
 	} else {
-		// No cookie containing valid authentication token found, redirecting to loginpage
+		// No cookie containing valid authentication token found;
+		//   explicitly deleting any remaining cookie, then redirecting to loginpage
+		setcookie('JWT', FALSE);
+
 		header("HTTP/1.1 401 Unauthorized");
 		header("Location: lucidAuth.login.php?ref=" . base64_encode(json_encode($proxyHeaders)));
 	}