exists check fixed to bool instead of is None

Author: igorbenav

src/app/api/v1/rate_limits.py

@@ -92,11 +92,11 @@ async def patch_rate_limit(
         raise NotFoundException("Rate Limit not found")
 
     db_rate_limit_path = await crud_rate_limits.exists(db=db, tier_id=db_tier["id"], path=values.path)
-    if db_rate_limit_path is not None:
+    if db_rate_limit_path:
         raise DuplicateValueException("There is already a rate limit for this path")
 
     await crud_rate_limits.exists(db=db)
-    if db_rate_limit_path is not None:
+    if db_rate_limit_path:
         raise DuplicateValueException("There is already a rate limit with this name")
 
     await crud_rate_limits.update(db=db, object=values, id=db_rate_limit["id"])