fixed parsing of API returns

lm_eval/models/openai_completions.py

@@ -162,18 +162,15 @@ class OpenaiChatCompletionsLM(LM):
                 presence_penalty=self.presence_penalty,
                 temperature=self.temperature,
                 top_p=self.top_p,
-                # stop=until,
             )
 
             for resp, (context, args_) in zip(response.choices, chunk):
-                print(resp)
-                import sys; sys.exit()
-
-                s = resp["text"]
+                s = resp.message.content
 
                 # until_ = args_.get("until", ["<|endoftext|>"])
-                until_ = args_.get("until", "null")
+                until_ = args_.get("until", None)
 
+                if until_ is not None:
                     for term in until_:
                         if len(term) > 0:
                             s = s.split(term)[0]