bug fix

agents.py

@@ -202,9 +202,9 @@ class GeminiAgent(LLMAgentBase):
         kwargs['start_timer_on_battle_start'] = True
         super().__init__(*args, **kwargs)
         self.model_name = model
-        used_api_key = api_key or os.environ.get("GOOGLE_API_KEY")
+        used_api_key = api_key or os.environ.get("GEMINI_API_KEY")
         if not used_api_key:
-            raise ValueError("Google API key not provided or found in GOOGLE_API_KEY env var.")
+            raise ValueError("Google API key not provided or found in GEMINI_API_KEY env var.")
         
         # Initialize Gemini client using the correct API
         self.genai_client = genai.Client(api_key=used_api_key)