Fix issue where aiohttp.ClientResponse data wasn't being awaited on during HTTP exception handling

Author: cmbernard333

openfga_sdk/rest.py

@@ -278,6 +278,9 @@ async def handle_response_exception(
         if 200 <= response.status <= 299:
             return
 
+        if isinstance(response, aiohttp.ClientResponse):
+            response.data  = await response.read()
+
         match response.status:
             case 400:
                 raise ValidationException(http_resp=response)