Package session provides a convenient way to store session data (such as a user ID) securely in a web browser cookie or other authentication token. Cookie values generated by this package use modern authenticated encryption, so they can't be inspected or altered by client processes. Most users of this package will use functions Set and Get, which manage cookies directly. An analogous pair of functions, Encode and Decode, help when the session data will be stored somewhere other than a browser cookie; for example, an API token configured by hand in an API client process.