change file

api_service.py

@@ -50,7 +50,7 @@ async def lifespan(app: FastAPI):
         )
         client = chromadb.PersistentClient(path=VECTOR_DB_DIR)
         vectorstore = Chroma(
-            client=client,
+            persist_directory=VECTOR_DB_DIR,
             collection_name=COLLECTION_NAME,
             embedding_function=embeddings
         )