you are able to login to impartus site via web browser (using same credentials)
if password contains any special characters , I am currently not json_encoding the credentials while sending it to auth api, so any special chars may be causing the issue.
If you have reset your password recently, may try using the old password in case it is not synced with impartus server.
ERROR:Impartus:Error authenticating to https://a.impartus.com/api/auth/signin with username *****@wilp.bits-pilani.ac.in. ERROR:Impartus:Http response code: 401, response body: {"success":false,"mailSent":true}: