changes to the register option to have an optin button for the marketing emails

Website/main.py

@@ -1904,6 +1904,7 @@ def register():
         email = (request.form.get("email") or "").strip().lower()
         password = request.form.get("password") or ""
         password_repeat = request.form.get("password_repeat") or ""
+        marketing_opt_in = True if request.form.get("marketing_opt_in") == "on" else False
 
         if not username or not school_name or not contact_person or not email or not password or not password_repeat:
             flash("Bitte alle Felder ausfüllen.", "error")
@@ -1936,7 +1937,8 @@ def register():
         try:
             existing_users = user_store.get_all_users() or []
             is_first_user = len(existing_users) == 0
-            if not user_store.add_user(username, password, school_name, contact_person, email):
+            
+            if not user_store.add_user(username, password, school_name, contact_person, email, marketing_opt_in=marketing_opt_in):
                 flash("Benutzer konnte nicht erstellt werden.", "error")
                 return redirect(url_for("register"))