Set GOOGLE_API_KEY environement variable.

llm_call.py

@@ -33,6 +33,8 @@ class GeminiLLM():
         if os.getenv('GOOGLE_GEMINI_TOKEN') is None:
             raise ValueError("GOOGLE_GEMINI_TOKEN environment variable not set")
         else:
+            os.environ["GOOGLE_API_KEY"] = os.getenv('GOOGLE_GEMINI_TOKEN')
+
             self.llm  = ChatGoogleGenerativeAI(
                 model = self.model_name,
                 temperature = 0.7,