The account list file is stored at `./config/admin_user.json`. The users are stored at `users`.
The key is the username. The `permissions` field could be a string, using a permission set from the example, or an object, to define a specific set of permissions.
eg. An account for a judge could be as follows, to use the default permission of judges,
"username": {
"password": "123456",
"enabled": true,
"permissions": "judge"
},
or as follows, to use a specific set of permissions.