NewTokenService is an exported function used to initialize a new authService struct.

TokenService is used by the app to manage db auth functionality.

BlacklistService is an interface used to manage the relevant group doc controllers.

FileService is an interface used to manage the relevant file doc controllers.

GroupService is an interface used to manage the relevant group doc controllers.

TaskService is an interface used to manage the relevant task doc controllers.

UserService is an interface used to manage the relevant user doc controllers.