add keycloak auth to playground ui

llama_stack/distribution/ui/app.py

@@ -50,6 +50,36 @@ def main():
     )
     pg.run()
 
+def main2():
+    from dataclasses import asdict
+    st.subheader(f"Welcome {keycloak.user_info['preferred_username']}!")
+    st.write(f"Here is your user information:")
+    st.write(asdict(keycloak))
+
+def get_access_token() -> str|None:
+    return st.session_state.get('access_token')
 
 if __name__ == "__main__":
-    main()
+    
+    from streamlit_keycloak import login
+    import os
+    
+    keycloak_url = os.environ.get("KEYCLOAK_URL")
+    keycloak_realm = os.environ.get("KEYCLOAK_REALM", "default")
+    keycloak_client_id = os.environ.get("KEYCLOAK_CLIENT_ID")
+    
+    if keycloak_url and keycloak_client_id:
+        keycloak = login(
+            url=keycloak_url,
+            realm=keycloak_realm,
+            client_id=keycloak_client_id,
+            auto_refresh=True,
+            init_options={"checkLoginIframe": False},
+        )
+
+        if keycloak.authenticated:
+            st.session_state['access_token'] = keycloak.access_token
+            main()
+    # TBD - add other authentications
+    else:
+        main()