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Most of these scripts will prompt you for your Confluence password so that they can log in to Confluence. Some scripts will take a login token on the command line instead; run hwdblogin.py to get a token. Each such token is good for 60 minutes but will also expire if not used for anything for 20 minutes.
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All commands will log you in to Confluence just once and will terminate when the login expires.
There are several different types of authentication failures that you may see:
Creating blank pages: makeblanks.py
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