Creating Temporary access to download files with random credential instead of common password

We have a mobile application with multiple users accounts, everyone needs to download the certain files from dropbox. But we don't want to make the dropbox files to give public access or not to manage through team users in dropbox. What would be the best way to make the download process secured for each user.

We want to create temporary links / access / any other way to download files by user with separate credential

We are providing API to mobile application users, so we need to provide temporary access to download a file who calls an API like this /media/{id}/download. So we need set password or create temporary link to download the file. we need to acheive this throuh dropbox API. we checked shared_link API "https://dropbox.github.io/dropbox-api-v2-explorer/#sharing_create_shared_link_with_settings" with expires / password but when we try to create another link it throws link already exists. we want to create different link for each request and set different password. A new temporary link for each request. The link can even expire withing five minutes