diff --git a/.gitignore b/.gitignore
index dac81c4..ba134b3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ __pycache__
 .vscode
 poetry.lock
 .venv
+.ruff_cache
diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 7155c6c..216072e 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,7 @@
+[0.2.20]
+- added logger
+- typing revision
+
 [0.2.19]
 - fix: stripping user_id
 
diff --git a/resolvers/load.py b/resolvers/load.py
index 4e06bb2..4186d4b 100644
--- a/resolvers/load.py
+++ b/resolvers/load.py
@@ -9,6 +9,11 @@ from services.core import CacheStorage
 from services.rediscache import redis
 from services.schema import query
 
+import logging
+
+logger = logging.getLogger("[resolvers.load] ")
+logger.setLevel(logging.DEBUG)
+
 
 async def get_unread_counter(chat_id: str, member_id: int) -> int:
     unread = await redis.execute("LLEN", f"chats/{chat_id}/unread/{member_id}")
@@ -61,23 +66,27 @@ async def load_chats(_, info, limit: int = 50, offset: int = 0) -> Dict[str, Uni
     author_id = info.context["author_id"]
     chats = []
     if author_id:
+        logger.debug("got author", author_id)
         cids = await redis.execute("SMEMBERS", f"chats_by_author/{author_id}")
+        logger.debug("got cids", cids)
+        members_online = (await redis.execute("SMEMBERS", "authors-online")) or [] # to show online status
+        logger.debug("members online", members_online)
         if isinstance(cids, set):
-            members_online = (await redis.execute("SMEMBERS", "authors-online")) or []
             # TODO: add sort by chat.created_at with in-memory caching chats service
             cids = list(cids)[offset : (offset + limit)]
             lock = asyncio.Lock()
             if len(cids) == 0:
-                print(f"[resolvers.load] no chats for user with id={author_id}")
+                logger.debug(f"no chats for user with id={author_id}")
                 r = await create_chat(None, info, members=[2])  # member with id = 2 is discours
-                print(f"[resolvers.load] created chat: {r['chat_id']}")
+                logger.debug(f"created chat: {r['chat_id']}")
                 cids.append(r["chat"]["id"])
 
+            logger.debug(f"getting data for {len(cids)} user's chats")
             for cid in cids:
                 async with lock:
                     chat_str = await redis.execute("GET", f"chats/{cid}")
                     if isinstance(chat_str, str):
-                        print(f"[resolvers.load] redis GET by {cid}: {chat_str}")
+                        logger.debug(f"redis GET by {cid}: {chat_str}")
                         c: ChatPayload = json.loads(chat_str)
                         c["messages"] = (await load_messages(cid, 5, 0)) or []
                         c["unread"] = await get_unread_counter(cid, author_id)
@@ -88,7 +97,12 @@ async def load_chats(_, info, limit: int = 50, offset: int = 0) -> Dict[str, Uni
                             if a:
                                 a["online"] = a.get("id") in members_online
                                 c["members"].append(a)
+                            else:
+                                logger.error(f"cant find author by id {member_id}")
                         chats.append(c)
+
+                    else:
+                        logger.error(f"cant find chat by id {cid}")
     return {"chats": chats, "error": None}
 
 
diff --git a/services/auth.py b/services/auth.py
index af652c7..8153f00 100644
--- a/services/auth.py
+++ b/services/auth.py
@@ -16,7 +16,6 @@ async def check_auth(req) -> str | None:
     user_id = ""
     if token:
         # Logging the authentication token
-        # print(f"[services.auth] checking auth token: {token}")
         query_name = "validate_jwt_token"
         operation = "ValidateToken"
         headers = {