// Returns an array of structs containing details about users sessions. If
// session_filter is specified and is an array of user identifiers or
// session_keys, or a struct of session attributes, only sessions matching the
// filter will be returned. If return_fields is specified, only the
// specified details will be returned.
// Returns an array of structs containing details about users sessions. If
// session_filter is specified and is an array of user identifiers or
// session_keys, or a struct of session attributes, only sessions matching the
// filter will be returned. If return_fields is specified, only the
// specified details will be returned.