This setting allows you to define one or more authentication keys for autologin.
You can find this feature under Memberium -> Settings -> Login tab on your WordPress admin dashboard.
Since autologin auth keys are visible in links, to improve security, autologin auth keys are separate from web hooks auth keys.
As a best practice, your autologin auth key should be completely separate from all your other API keys. Don’t set it to something similar to your ActiveCampaign or Webhook keys.
You can define multiple auth keys by separating each one with a comma. This makes it easy to transition from one key to another by having multiple active keys at once. Note that deleting an auth key will render all links already sent out using that key useless.