Update app.py

app.py

@@ -39,9 +39,18 @@ class AnalyzePostRequest(BaseModel):
     hashtags: str
     image_url: str
 
+# Configure logging
+logging.basicConfig(level=logging.INFO)
+logger = logging.getLogger(__name__)
+
+# Rate limiting variables
 RATE_LIMIT_DELAY = 5  # Delay in seconds between API calls
 LAST_REQUEST_TIME = 0
 
+# Pydantic model for request validation
+class UserRequest(BaseModel):
+    username: constr(min_length=1, max_length=30, regex="^[a-zA-Z0-9._]+$")  # Instagram username format
+
 @app.post("/fetch-posts")
 async def fetch_posts(user: UserRequest):
     """