From the Volumio UI,:
Go to Settings
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Click on Sources
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You will find the login login options to enter your TIDAL, Qobuz and/or Highresuadio.com credentials.
Important : On the Volumio UIuser interface, make sure you are login logged in on your MyVolumio account and your device is enable enabled
(You can see if your device is enable on the profile pageACCOUNT PAGE)