我正在尝试在node.js应用程序中执行post请求，但不断收到一个我无法理解的错误。

{
    "message": "\"birthYear\" is not allowed",
    "path": [
        "birthYear"
    ],
    "type": "object.allowUnknown",
    "context": {
        "child": "birthYear",
        "value": "1992",
        "key": "birthYear",
        "label": "birthYear"
    }
}

我试图为创建的每个用户添加一个“生日”字段。首先，我将用户模型设置为：

const UserSchema = new Mongoose.Schema({
  email: { type: String, required: true, index: { unique: true } },
  password: { type: String, required: true },
  username: { type: String, required: true },
  admin: { type: Boolean, required: true },
  firstName: { type: String, required: true },
  lastName: { type: String, required: true },
  birthYear: { type: String, required: true },
});

如果我尝试在没有生日字段的情况下进行post请求，我会在postman中收到一条消息，说这是必需的。
这是我的控制器的外观

public async create(request, h): Promise<Hapi.ServerResponse> {
    try {
      const payload: User = request.payload;
      const exists: boolean = await UserRepository.doesExist(payload);
      if (exists) {
        throw new Error("A user already exists with that email.");
      }
      const user: User = await UserRepository.create(payload);
      console.log(payload);

      const token = Token.create(user);

      user.password = undefined;

      const response: Login = {
        // eslint-disable-next-line @typescript-eslint/camelcase
        auth_token: token,
        user,
      };

      return h.response(response);
    } catch (error) {
      return h
        .response({ status: "error", error: error.message })
        .code(400)
        .takeover();
    }
  }