strapi/examples/getstarted/plugins/myplugin/models/Test.settings.json

{
  "connection": "default",
  "info": {
    "name": "test",
    "description": ""
  },
  "attributes": {
    "type": {
      "type": "string",
      "required": true,
      "unique": true,
      "configurable": true
    }
  }
}