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I would imagine the token a seed, so it's not actually stored. For security you wouldn't want the token to be accessible.

I imagine the token is somewhere stored so as to authenticate the next node. I would expect that a root user would be able to show the token when needed so as to copy it and use it, similar to the flow when adding kubernetes or docker swarm nodes. Other solutions generate the token automatically and display it only once so as to store it somewhere else.