fixed db issue

db.py

@@ -3,7 +3,7 @@ from redis import Redis
 from dotenv import load_dotenv
 from uuid import uuid4
 
-load_dotenv(".env.local")
+load_dotenv(".env")
 import os
 import json
 from redis.commands.json.path import Path
@@ -46,7 +46,9 @@ def create_user(client: Redis, user: User):
 
 def get_user_by_username(client: Redis, username: str) -> Optional[User]:
     uid = client.get(f"user:uuid:by-username:{username}")
-    user = client.json().get(f"user:by-uid:{uid}", "$")[0]
+    user = client.json().get(f"user:by-uid:{uid}", "$")
+    if user:
+       user = user[0]
     return user