> resolve_username vahid_mas

{"user": {"username": "Vahid_Mas", "id": "$010000006459670b02c0c7fd66d44708", "last_name": "", "peer_type": "user", "print_name": "Vahid", "flags": 720897, "peer_id": 191322468, "first_name": "Vahid", "phone": "xxxxxxx"}, "online": false, "event": "online-status", "state": -1, "when": "2017-01-22 17:43:16"}