This should perhaps be placeholder text the readme specifies to change, or an environment variable for the script to reference per user rather than sharing a key from your account in the open source library. That key has been disabled for that account's security in case it was by accident.
If you do however want to share a key, which I'd advise against, that key has been disabled so you'll need to update it to the new one in your account, but again I'd suggest just instructing users to use their own as any kind of weirdness from keys could trigger it being flagged or disabled in the future again anyways.
The observing account's api key was found in package.json here:
https://github.com/observing/fullcontact/blob/master/package.json#L14
This should perhaps be placeholder text the readme specifies to change, or an environment variable for the script to reference per user rather than sharing a key from your account in the open source library. That key has been disabled for that account's security in case it was by accident.
If you do however want to share a key, which I'd advise against, that key has been disabled so you'll need to update it to the new one in your account, but again I'd suggest just instructing users to use their own as any kind of weirdness from keys could trigger it being flagged or disabled in the future again anyways.
cc @3rd-Eden