Package bg implements wrapper for running client in background.

WithAuth allows to override the authorization flow.

WithPeerStorage allows to specify a custom storage for peer data.

WithStorage allows to specify custom session storage.

ErrAlreadyRunning is returned if the attempt is made to start the client, while there's another instance running asynchronously.

MemStorage is the default peer storage for MTP.

Entity interface is the subset of functions that are commonly defined on most entities in telegram lib.