loopback/test/fixtures/access-control/common/models/access-token.json

{
  "name": "accessToken",
  "base": "AccessToken",
  "baseUrl": "access-tokens",
  "acls": [
    {
      "accessType": "*",
      "permission": "DENY",
      "principalType": "ROLE",
      "principalId": "$everyone"
    },
    {
      "permission": "ALLOW",
      "principalType": "ROLE",
      "principalId": "$everyone",
      "property": "create"
    }
  ],
  "relations": {
    "user": {
      "type": "belongsTo",
      "model": "user",
      "foreignKey": "userId"
    }
  }
}