Wondering if people might have ideas for a problem I'm encountering. I have a iOS app that uses clerk for authentication. In this iOS app, I spin up a conversation with a Vapi assistant that has some tools. In order to call these tools, I initiate the conversation with a server secret equal to the clerk JWT token. This makes it so that the tool calls Vapi sends to my backend include a JWT token (which identifies the user / customizes the tool response for them). The problem is that Clerk expires JWT tokens every minute, so after a minute the conversation tool calls start to fail. I could think of some ways to fix this but I'm wondering if I'm doing it wrong and if people have better ways to pass user auth through the assistant secret