fix: improve maintenance and synchronize live conversations

backend/app/core/auth.py

@@ -15,7 +15,6 @@ limitations under the License.
 """
 
 from fastapi import Depends, HTTPException, status, Cookie, Request
-from fastapi.security import HTTPBearer
 from sqlalchemy.orm import Session
 from typing import Callable, Iterable, Optional, List
 from uuid import UUID
@@ -25,7 +24,6 @@ from app.models.user import User
 from app.models.organization import Organization
 from app.services.auth_sessions import ACCESS, live_payload
 from app.core.logger import get_logger
-from app.models.role import Role
 
 logger = get_logger(__name__)