* [FEATURE] Add token generation for OAuth2
[FEATURE] Add function to get new zak token
[BUGFIX] Remove type return as it can return bool or array (waiting for PHP 8 and union types)
[BUGFIX] Add possibility to return bool value if request sends 2xx status and without respone in general
[TASK] Direct return of succeeded change or deletion of room
[BUGFIX] Remove initialisation [TASK] Add exceptions when request did not work
[BUGFIX] Add initialisation before sending request
[FEATURE] Add option to use other users for creating meeting room