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Good question.

Steemfollower uses a refresh token so you only need to log in once; they can refresh it as needed. For some reason, I can't log out.

Ultimately it would be through steemconnect. Ideally you would want to use your posting key. Maybe your steemconnect password is an alternative to using your posting key, maybe it isn't. It really depends what key you told steem connect to remember-if remember is the right word.

Interesting. Thanks.