initialize user

lib/account.php

@@ -8,6 +8,17 @@ function isLoggedIn(): bool
     return $_SESSION["ID"] > 0 && !empty($_SESSION["email"]) && $_SESSION["privilegelevel"] >= $routerConfig["logged_in_default_permission_level"];
 }
 
+function setDefaultSessionData(): void
+{
+    $_SESSION["ID"] = 0;
+    $_SESSION["first_name"] = "";
+    $_SESSION["last_name"] = "";
+    $_SESSION["nickname"] = "";
+    $_SESSION["email"] = "";
+    $_SESSION["mcnick"] = "";
+    $_SESSION["privilegelevel"] = 0;
+}
+
 function generateActivationToken(): string
 {
     try {