Cannot find file to manage the admin_token

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Hello

I am using the docker container of vaultwarden. It is running so far. But now I want to add the admin_token to enable the admin panel. Unfortunately I cannot find the file where to add the token to.

root@my-vps:/# docker ps -a
CONTAINER ID   IMAGE                             COMMAND       CREATED             STATUS                         PORTS                                                                                  NAMES
28467bf615f7   vaultwarden/server:latest         "/start.sh"   About an hour ago   Up About an hour (healthy)     0.0.0.0:8080->80/tcp, [::]:8080->80/tcp                                                vaultwarden
41c936be580a   jc21/nginx-proxy-manager:latest   "/init"       About an hour ago   Up About an hour               0.0.0.0:80-81->80-81/tcp, :::80-81->80-81/tcp, 0.0.0.0:443->443/tcp, :::443->443/tcp   root_app_1
bcb3768a1009   hello-world                       "/hello"      About an hour ago   Exited (0) About an hour ago                                                                                          competent_chaum
root@my-vps:/#

How can I enter the container and where do I need to add the token to? Any help appreciated.

Kind regards
//neph