Livebook - how to get token value?

I try to run livebook as deamon but I can’t get token value .
When I run :
MIX_ENV=prod elixir -S mix phx.server
I’ve got : [Livebook] Application running at http://localhost:3069/?token=6yyvzdgunwrkn7kqgr25tzcsocetrmvd
but when I run via :
MIX_ENV=prod elixir --erl “-detached” -S mix phx.server
there is no [Livebook]… , token information .

Is there any option to get token value in deamon mode ?

Thanks in advance for help .

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