I purchased this deal a while back and now trying to utilize my credits via the API.

I've generated an API key in my dashboard (it shows as "Active") and I'm attempting to use it with the single email verification endpoint (https://apps.emaillistverify.com/api/verifyEmail) using a standard GET request with the key passed in the secret parameter.

However, every API call results in the following error:
API Error: 401 - {"statusCode":401,"message":"Invalid api key","error":"Unauthorized"}

I have double-checked that the API key I'm using in my script matches the active key shown in my dashboard.

Could you let me know if there might be an issue with the API itself, the key validation system, or my specific API key (even though it shows as active)?