Best approach for clients to search for users

I’m looking at using Auth0 for a project and was just curious about what is the best approach for an Express/ReactJS app to allow clients to search for user information. Can I query from Auth0 directly, or do I need to connect my database and store the data separately to query from that?

No, you don’t need to store the user data separately in a database. You can call the Auth0 Management API List or Search Users endpoint from your Express/React app to search for user information. Further details around user search can be found here.