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Array
(
    [type] => https://mailchimp.com/developer/marketing/docs/errors/
    [title] => API Key Invalid
    [status] => 401
    [detail] => Your API key may be invalid, or you've attempted to access the wrong datacenter.
    [instance] => 2be75344-6af2-20f2-7455-ad8075492fee
)
last request
Array ( [method] => get [path] => lists [url] => https://us19.api.mailchimp.com/3.0/lists [body] => [timeout] => 10 [headers] => GET /3.0/lists? HTTP/2 Host: us19.api.mailchimp.com user-agent: DrewM/MailChimp-API/3.0 (github.com/drewm/mailchimp-api) accept-encoding: deflate, gzip, br accept: application/vnd.api+json content-type: application/vnd.api+json authorization: apikey 23f179bf561b0f47cb09f190474a961a-us19 )