Double deposit for 66458 and 463157

[valefar-on-discord]

After reviewing my changes for #10 I noticed there were two validators in this set that did two deposits of 32 ETH and still have 0x00 credentials 😬

https://beaconcha.in/validator/66458#deposits
https://beaconcha.in/validator/463157#deposits

So that would be two valid addresses that could be used for authentication. Given there are only two validators of this set, this is not something we should worry about but if it comes up this issue will be a good placeholder 😄