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https://confluence.atlassian.com/bitbucketserver/ssh-user-keys-for-personal-use-776639793.html
Also using the API tokens feature in Kantega SSO for git authentication is supported. Then you must enable the /scm endpoint in the API token access section (see below):
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And each user that wants to use API tokens must create his own token and use git URLs like this:git clone https://<username>:<128-chars-API-token>@bitbucket-test.example.com/scm/test/test.git