{
    "$schema": "http://json-schema.org/draft-06/schema#",
    "description": "400 error returned on user creation, if bad data was probvided, or the user exists in the system",
    "type": "object",
    "properties": {
        "status": {
            "type": "integer"
        },
        "message": {
            "type": "string",
            "oneOf": [
              {"const": "user already exists"},
              {"const": "invalid request. Validate data using provided schema"}
            ]
        },
        "link": {
            "type": "string"
        }
    },
    "required": [
        "status",
        "message",
        "link"
    ]
}
