modulo usuarios

backend/app/core/config.py

@@ -1,5 +1,4 @@
 from pydantic_settings import BaseSettings
-from typing import Optional
 
 class Settings(BaseSettings):
     # Database
@@ -11,7 +10,7 @@ class Settings(BaseSettings):
     ACCESS_TOKEN_EXPIRE_MINUTES: int = 10080  # 7 días
     
     # OpenAI
-    OPENAI_API_KEY: Optional[str] = None
+    OPENAI_API_KEY: str | None = None
     
     # Environment
     ENVIRONMENT: str = "development"