Hey Callum, yes a 401 Error refers to an authorization error with your API key. The most common reason for a 401 error is that the API key is incorrect, expired, or not provided. Since you are not paying for a Findymail subscription, your API key is liked not authorized to call to the endpoint you are looking for. To resolve this, you will need to verify if your API key is valid and has the correct permissions.
If you're looking to find LinkedIn profile information and don't have a Findymail subscription, I'd actually use the Enrich Person from Profile integration as this pulls all the same information (full LinkedIn profile scrape) for a fraction of the cost.
Here's a tutorial on how to enrich people in Clay: tutorial.
Let me know if this makes sense and what you end up doing!
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