I'm trying to upload items in Catalog V2 from local data retrieved and serialized from another title (I'm building a dev, staging and prod environments). Passing the secret key in the header doesn't seem to be enough, it also requires a user session. I may be missing something here, but how do I get an EntityToken for an admin user? (not a player and not a server) The functionalities should be the exact same as the Playfab dashboard. I'm trying to automate what someone would have to do manually through the dashboard, if that makes sense. I'm using the latest Unity Playfab SDK and editor extension.