This fix allows users of countries which use leading zeros in their national phone numbers to authenticate successfully by using the version of their number with the leading zero, which without this patch fails to be recognized.
coverage: 97.923%. remained the same
when pulling af6214e5c9ee0023d80af1e32b5ab78009589b06 on fixes/auth-backend-leading-zero
into 8a39e488b0b955c7322f6df7927d2adb71ce7caf on master.
This fix allows users of countries which use leading zeros in their national phone numbers to authenticate successfully by using the version of their number with the leading zero, which without this patch fails to be recognized.