1  {
 2    "$schema": "http://json-schema.org/draft-07/schema#",
 3    "title": "User",
 4    "type": "object",
 5    "properties": {
 6      "id": { "type": "integer" },
 7      "username": { "type": "string" },
 8      "email": { "type": "string", "format": "email" }
 9    },
10    "required": ["id", "username", "email"]
11  }