Retrieve signed key requests

curl --request GET \
  --url https://build.wield.xyz/farcaster/v2/signed-key-requests \
  --header 'API-KEY: <api-key>'

{
  "result": {
    "requestFid": "<string>",
    "deadline": "2023-11-07T05:31:56Z",
    "key": "<string>",
    "signature": "<string>"
  },
  "source": "v2"
}