PhotosArtist-Vertige:
Account, account selection.

Once an account has been created, clicking on the accounts button displays the following screen:
 

Select the account you want in the drop-down menu (1).
Now type in your password (2).
If you forgot your password, click on the return button (3).
An email will be sent to you with your password.
Then click on the validation button for the selected account (4).
You can also create a new account from this screen (5)
 

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Important note: two accounts cannot have the same email address.