i have faced the same problem. i called the fpsc and told them about my problem. they said that you are already a registered candidate. but my situation was very serious . i had forgotten my login , password but only know my email. they replied me your login with id will send on your email adresss.
after 2 days i received an email. via this mail my problem is solved

you can call fpsc on this matter
send a request with your email and wait the reply of fpsc

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The world suffers a lot, not because of the violence of bad people, but because of the silence of good people.