Carry forward allowance for Pension - opted out from employer

Hi If i want to use the carry forward pension allowance from previous 3 years for Pension contribution, it says on HMRC website: "You cannot carry forward unused allowances from any tax year where you were not a member of at least one UK registered pension scheme." If a person was auto enrolled by their employer and was a member of a registered pension scheme but later opted out from making contributions, will they still be considered member of the scheme and be able to carry forward previous years allowance?

Hi,
The answer to your question is no.
Thank you.