working on confirmed subscription

src/main/java/de/srsoftware/widerhall/web/Web.java

@@ -329,6 +329,7 @@ public class Web extends HttpServlet {
         data.put(NAME,name);
         data.put(EMAIL,email);
         data.put(LIST,listEmail);
+        var skipConfirmation = false;
 
         var list = MailingList.load(listEmail);
 
@@ -351,6 +352,7 @@ public class Web extends HttpServlet {
             int code = cause.getErrorCode();
             if (code == PRIMARY_KEY_CONSTRAINT) try {// user already exists
                 user = User.loadUser(email,pass);
+                skipConfirmation = pass != null; // subscription with email address already known to database
                 // success → subscribe
             } catch (InvalidKeyException | SQLException e) {
                 // invalid credentials
@@ -361,7 +363,7 @@ public class Web extends HttpServlet {
         data.put(USER,user.safeMap());
 
         try {
-            list.requestSubscription(user);
+            list.requestSubscription(user,skipConfirmation);
             data.put(NOTES,t("Successfully subscribed '{}' to '{}'.",user.email(),list.email()));
             return loadTemplate(INDEX,data,resp);
         } catch (SQLException sqle) {