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Specify the email address, create and confirm the password and accept the terms & conditions,
check Check your email for the confirmation letter sent; confirm the registration either following the link in the letter or pasting the confirmation code from the email into the registration form; you may also scan the QR-code from the letter to log into your new profile from the Link mobile app
On your first login to the server, the pop-up will appear including the QR-codes to the mobile apps
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