Move in-memory session storage to the separate directory of `storage`. It is done for future support of different kind of session storages. Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Implement Session service executor that generates private token and stores it to map. Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>