fix: get POAP API access to fix the `hasPOAPs` method

[mds1]

Ref https://github.com/ScopeLift/umbra-protocol/pull/464#discussion_r1109297803

This check currently fails with the error GET https://api.poap.xyz/actions/scan/0xD2553382a60F121d9b1e35cFC9EBF4870FbCC96F net::ERR_NAME_NOT_RESOLVED

It seems the POAP API now requires an access key: https://documentation.poap.tech/docs/api-access

[garyghayrat]

If easy enough, add POAP key. Or remove POAP API all together.