add user_update_for_group event to SystemHookEvent

Author: simon-weimann

gitlab4j-models/src/main/java/org/gitlab4j/api/systemhooks/GroupMemberSystemHookEvent.java

@@ -9,6 +9,7 @@ public class GroupMemberSystemHookEvent extends AbstractSystemHookEvent {
 
     public static final String NEW_GROUP_MEMBER_EVENT = "user_add_to_group";
     public static final String GROUP_MEMBER_REMOVED_EVENT = "user_remove_from_group";
+    public static final String GROUP_MEMBER_UPDATE_EVENT = "user_update_for_group";
 
     private Date createdAt;
     private Date updatedAt;

gitlab4j-models/src/main/java/org/gitlab4j/api/systemhooks/SystemHookEvent.java

@@ -40,6 +40,9 @@
     @JsonSubTypes.Type(
             value = RemoveGroupMemberSystemHookEvent.class,
             name = GroupMemberSystemHookEvent.GROUP_MEMBER_REMOVED_EVENT),
+    @JsonSubTypes.Type(
+            value = UpdateGroupMemberSystemHookEvent.class,
+            name = GroupMemberSystemHookEvent.GROUP_MEMBER_UPDATE_EVENT),
     @JsonSubTypes.Type(value = PushSystemHookEvent.class, name = PushSystemHookEvent.PUSH_EVENT),
     @JsonSubTypes.Type(value = TagPushSystemHookEvent.class, name = TagPushSystemHookEvent.TAG_PUSH_EVENT),
     @JsonSubTypes.Type(
@@ -142,3 +145,7 @@ class NewGroupMemberSystemHookEvent extends GroupMemberSystemHookEvent {
 class RemoveGroupMemberSystemHookEvent extends GroupMemberSystemHookEvent {
     private static final long serialVersionUID = 1L;
 }
+
+class UpdateGroupMemberSystemHookEvent extends GroupMemberSystemHookEvent {
+    private static final long serialVersionUID = 1L;
+}

gitlab4j-models/src/test/java/org/gitlab4j/models/TestGitLabApiEvents.java

@@ -271,6 +271,12 @@ public void testGroupMemberSystemHookEvent() throws Exception {
         assertTrue(compareJson(event, "group-member-system-hook-event.json"));
     }
 
+    @Test
+    public void testGroupMemberUpdateSystemHookEvent() throws Exception {
+        SystemHookEvent event = unmarshalResource(SystemHookEvent.class, "group-member-update-system-hook-event.json");
+        assertTrue(compareJson(event, "group-member-update-system-hook-event.json"));
+    }
+
     @Test
     public void testTagPushSystemHookEvent() throws Exception {
         SystemHookEvent event = unmarshalResource(SystemHookEvent.class, "tag-push-system-hook-event.json");

gitlab4j-models/src/test/resources/org/gitlab4j/models/group-member-update-system-hook-event.json

@@ -0,0 +1,13 @@
+{
+  "created_at": "2025-07-09T09:09:27Z",
+  "updated_at": "2025-09-06T07:12:24Z",
+  "group_name": "StoreCloud",
+  "group_path": "storecloud",
+  "group_id": 17995,
+  "user_username": "john-doe",
+  "user_name": "John Doe",
+  "user_email": "johndoe@example.com",
+  "user_id": 12218,
+  "group_access": "Maintainer",
+  "event_name": "user_update_for_group"
+}