Remove role(s) from user

{
  "type": "object",
  "properties": {
    "organizationId": {
      "type": "string"
    },
    "roles": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "username": {
      "type": "string"
    }
  },
  "required": [
    "organizationId",
    "username"
  ],
  "additionalProperties": false
}