Update app.py

app.py

@@ -10,6 +10,38 @@ from chainlit.playground.config import add_llm_provider
 from chainlit.playground.providers.langchain import LangchainGenericProvider
 import chainlit as cl
 
+import os
+from authlib import OAuth2Session  # This is a placeholder for whatever OAuth library you're using
+
+# Retrieving environment variables
+OAUTH_CLIENT_ID = os.getenv("OAUTH_CLIENT_ID")
+OAUTH_CLIENT_SECRET = os.getenv("OAUTH_CLIENT_SECRET")
+OAUTH_SCOPES = os.getenv("OAUTH_SCOPES").split(',')  # Assuming OAUTH_SCOPES is a comma-separated list
+OPENID_PROVIDER_URL = os.getenv("OPENID_PROVIDER_URL")
+SPACE_HOST = os.getenv("SPACE_HOST")
+
+# Constructing the redirect URL using the SPACE_HOST variable
+redirect_uri = f"https://{SPACE_HOST}/login/callback"
+
+# Initializing the OAuth client/session with the retrieved environment variables
+oauth_client = OAuth2Session(client_id=OAUTH_CLIENT_ID,
+                             redirect_uri=redirect_uri,
+                             scope=OAUTH_SCOPES)
+
+# Redirect the user to the authorization URL
+authorization_url, state = oauth_client.authorization_url(OPENID_PROVIDER_URL + '/authorize')
+
+# Note: The actual redirect and callback handling will depend on your web framework (e.g., Flask, Django)
+
+# After the user authorizes your app and is redirected back to your redirect_uri,
+# you would exchange the authorization code for an access token
+oauth_client.fetch_token(OPENID_PROVIDER_URL + '/token',
+                         client_secret=OAUTH_CLIENT_SECRET,
+                         authorization_response='URL where user was redirected')
+
+# Now you can use oauth_client to make authorized requests on behalf of the user
+
+
 # Instantiate the LLM
 llm = HuggingFaceHub(
     model_kwargs={"max_length": 500},