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I'm reading the text here:

https://www.sympa.org/manual_6.1/message-handling#unsubscription_url

I have one additional question.  How do I set this so that a user can
unsubscribe with one click?

In this case they do not want email confirmation, and they do not want users
to have to log in to unsubscribe.  I understand the risks involved with a
setup like this.  Do I need to edit the scenario source so that it does not
request authorization first?

Thank you in advance for your assistance.