runtime error

Traceback (most recent call last): File "/home/user/app/app.py", line 82, in <module> response = chat_session.send_message(context + "\n" + "Here are some examples for your interactions: \n" + ".\n".join( File "/usr/local/lib/python3.10/site-packages/google/generativeai/generative_models.py", line 496, in send_message response = self.model.generate_content( File "/usr/local/lib/python3.10/site-packages/google/generativeai/generative_models.py", line 262, in generate_content response = self._client.generate_content( File "/usr/local/lib/python3.10/site-packages/google/ai/generativelanguage_v1beta/services/generative_service/client.py", line 812, in generate_content response = rpc( File "/usr/local/lib/python3.10/site-packages/google/api_core/gapic_v1/method.py", line 131, in __call__ return wrapped_func(*args, **kwargs) File "/usr/local/lib/python3.10/site-packages/google/api_core/retry/retry_unary.py", line 293, in retry_wrapped_func return retry_target( File "/usr/local/lib/python3.10/site-packages/google/api_core/retry/retry_unary.py", line 153, in retry_target _retry_error_helper( File "/usr/local/lib/python3.10/site-packages/google/api_core/retry/retry_base.py", line 212, in _retry_error_helper raise final_exc from source_exc File "/usr/local/lib/python3.10/site-packages/google/api_core/retry/retry_unary.py", line 144, in retry_target result = target() File "/usr/local/lib/python3.10/site-packages/google/api_core/timeout.py", line 120, in func_with_timeout return func(*args, **kwargs) File "/usr/local/lib/python3.10/site-packages/google/api_core/grpc_helpers.py", line 78, in error_remapped_callable raise exceptions.from_grpc_error(exc) from exc google.api_core.exceptions.InvalidArgument: 400 API Key not found. Please pass a valid API key. [reason: "API_KEY_INVALID" domain: "googleapis.com" metadata { key: "service" value: "generativelanguage.googleapis.com" } ]

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