validation services added

Events/Engine/abstract_class.py

@@ -181,22 +181,22 @@ class CategoryCluster:
 
     TAGS: list
     PREFIX: str
-    PAGEINFO: PageInfo
+    PAGEINFO: Optional[PageInfo]
     DESCRIPTION: str
     ENDPOINTS: dict[str, MethodToEvent]  # {"MethodToEvent": MethodToEvent, ...}
     SUBCATEGORY: Optional[List["CategoryCluster"]]  # [CategoryCluster, ...]
     INCLUDE_IN_SCHEMA: Optional[bool] = True
 
     def __init__(
-        self,
-        name: str,
-        tags: list,
-        prefix: str,
-        description: str,
-        pageinfo: PageInfo,
-        endpoints: dict[str, MethodToEvent],
-        sub_category: list,
-        include_in_schema: Optional[bool] = True,
+            self,
+            name: str,
+            tags: list,
+            prefix: str,
+            description: str,
+            endpoints: dict[str, MethodToEvent],
+            sub_category: list,
+            pageinfo: Optional[PageInfo] = None,
+            include_in_schema: Optional[bool] = True,
     ):
         self.NAME = name
         self.TAGS = tags