Merge pull request 'board members can delete trips, proper notification + succ message is created' (#1048) from board-can-delete-trips into main

Reviewed-on: #1048

src/model/mail.rs

@@ -261,7 +261,7 @@ Der Vorstand");
                         ActivityBuilder::new(&format!(
                             "{user} hat die Info-Mail bzgl. Gebühren gesendet bekommen."
                         ))
-                        .relevant_for_user(&user)
+                        .user(&user)
                         .save(db)
                         .await;
                     }
@@ -388,7 +388,7 @@ Der Vorstand");
                             ActivityBuilder::new(&format!(
                                 "{user} hat die Mahn-Mail bzgl. Gebühren gesendet bekommen."
                             ))
-                            .relevant_for_user(&user)
+                            .user(&user)
                             .save(db)
                             .await;
                         }