Streamlit cloud's deployed app writes data to json file

From test I can access/update the data in json file. Is this safe? Where does the cloud save it?

I am referring to streamlit_login_auth_ui component. After registration the user info are saved in a json file located in the app working folder.

Hi @ferdy,

I wouldn’t recommend writing data that you may need to access in the future to the container where the app is deployed. Containers can be restarted at any time or may have multiple replicas to serve a higher volume of traffic. If the container restarts, the file will be erased. A better pattern would be to write the data to a persistent location such as Google Drive or Amazon S3, so that these files will persist beyond any specific container on Streamlit Community Cloud.