Dea AbhiK,
Defenetly not.. its not justify & even to share any user name & password with any unauthorised person, i belive is not legally accepted under cyber act.
but, you may ask contractor to submitts those details to you in form of hard copy or soft copy, as per your convience & for safety purpose, you may also take declaration as compliance certificate from contractors.
Regards,
Tushar Swar