Handle webhook permission errors
I was running 5.3.2 and ran into a similar problem with error handling not bubbling up on system checks - similar to this commit. However, in my case the issue is that the API key is valid, but lacks endpoint permissions. I got this error:
The provided key 'rk_live_********************O0YT' does not have the required permissions for this endpoint on account 'acct_1CZkiAHA8ztj9Qpg'. Having the 'rak_webhook_read' permission would allow this request to continue.
I'm proposing this as an alternative, since the error is of class
\Stripe\Error\Authentication, and to display the specific error passed back from Stripe. I know that's not as nice as a prettier error message, but Stripe's messages are fairly readable, and this will handle other unknown errors more gracefully.
I left the "Stripe - API Key" title alone, since I can't think of an instance where it wouldn't be tied to the API key somehow.