Implement on_after_update event handle

fastapi_users/fastapi_users.py

@@ -78,6 +78,10 @@ class FastAPIUsers:
         """Add an event handler on successful forgot password request."""
         return self._on_event(Event.ON_AFTER_FORGOT_PASSWORD)
 
+    def on_after_update(self) -> Callable:
+        """Add an event handler on successful update user request."""
+        return self._on_event(Event.ON_AFTER_UPDATE)
+
     def get_oauth_router(
         self, oauth_client: BaseOAuth2, state_secret: str, redirect_url: str = None
     ) -> EventHandlersRouter:

fastapi_users/router/common.py

@@ -15,6 +15,7 @@ class ErrorCode:
 class Event(Enum):
     ON_AFTER_REGISTER = auto()
     ON_AFTER_FORGOT_PASSWORD = auto()
+    ON_AFTER_UPDATE = auto()
 
 
 class EventHandlersRouter(APIRouter):

fastapi_users/router/users.py

@@ -169,6 +169,7 @@ def get_user_router(
 
     @router.patch("/me", response_model=user_model)
     async def update_me(
+        request: Request,
         updated_user: user_update_model,  # type: ignore
         user: user_db_model = Depends(get_current_active_user),  # type: ignore
     ):
@@ -176,7 +177,13 @@ def get_user_router(
             models.BaseUserUpdate, updated_user,
         )  # Prevent mypy complain
         updated_user_data = updated_user.create_update_dict()
-        return await _update_user(user, updated_user_data)
+        updated_user = await _update_user(user, updated_user_data)
+
+        await router.run_handlers(
+            Event.ON_AFTER_UPDATE, updated_user, updated_user_data, request
+        )
+
+        return updated_user
 
     @router.get(
         "/",