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See helseid.no and https://utviklerportal.nhn.no/informasjonstjenester/helseid/ for more information about integrating with HelseID. NB! KJ APIs require access tokens with the API Resource as the only audience, see doc at https://helseid.atlassian.net/wiki/spaces/HELSEID/pages/481755152/Requesting+multiple+access+tokens+with+single+audiences
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