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Your week is where you left it. Nothing has gone out while you were away that you had not already said yes to.
Signing in does not post anything. Nothing goes out until you open the week and say yes to it, the same as always.
If more than one person looks after your posts, each of them signs in with their own address rather than passing one password round.
No account yet? You can see a whole week of posts for your own business before you hand over anything at all.
Start with your website