Looking for logging into the Nextcloud Via Link site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Nextcloud Via Link site. After that you can login as usual with your login credentials.
https://docs.nextcloud.com/server/14/developer_manual/client_apis/LoginFlow/index.html
https://help.nextcloud.com/t/nextcloud-external-login/22204
https://docs.nextcloud.com/server/14/admin_manual/configuration_server/external_sites.html
https://help.nextcloud.com/t/feature-ui-where-sharing-link-in-nextcloud-14/38430
https://github.com/nextcloud/server/issues/8560
https://github.com/nextcloud/external/issues/111
https://github.com/nextcloud/server/issues/11149
https://github.com/nextcloud/android/issues/2308
https://github.com/zorn-v/nextcloud-social-login
https://central.owncloud.org/t/auto-login-via-url/5955
https://www.reddit.com/r/NextCloud/comments/85gxe5/how_to_share_via_link_without_password_nextcloud/
https://hackerone.com/reports/231917
https://www.uni-jena.de/unijenamedia/Downloads/einrichtungen/rz/dienste/Cloud/Anleitungen/SynchShare_ClientWebinterface.pdf