Hello @fierce-smartphone-54959 Thanks for contacting. On your queries,
• Rust SDK is essentially a server side SDK, it is pretty vanilla, and nothing is stored in memory. If you want to persist an id, you can do it on your end and use the same to generate requests.
• There shouldn’t be any issue calling the same from a different thread.
• As said earlier, Rust SDK is not storing any values or keys. You can instrument your own privacy policies and use customised ids for users.