Update app.py

app.py

@@ -8,7 +8,8 @@ from langchain.chains.question_answering import load_qa_chain
 from langchain.callbacks import get_openai_callback
 from langchain import HuggingFaceHub, LLMChain
 from langchain.embeddings import HuggingFaceHubEmbeddings,HuggingFaceInferenceAPIEmbeddings
-token = "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"
+os.environ["HUGGINGFACEHUB_API_TOKEN"] = "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"
+token = os.environ["HUGGINGFACEHUB_API_TOKEN"]
 repo_id = "sentence-transformers/all-mpnet-base-v2"
 hf = HuggingFaceHubEmbeddings(
     repo_id=repo_id,