improvement: add more aggresive rate limiting on smtp endpoints

frontend/src/pages/project/AccessControlPage/components/MembersTab/components/AddMemberModal.tsx

@@ -163,6 +163,7 @@ export const AddMemberModal = ({ popUp, handlePopUpToggle }: Props) => {
         text: "Failed to add user to project",
         type: "error"
       });
+      return;
     }
     handlePopUpToggle("addMember", false);
     reset();