访问 firebase.auth.AdditionalUserInfo 会引发 TypeScript 错误

Question

自从迁移到 ESLint 以来，我一直收到以下突出显示的错误消息：

  facebookSignIn(course?: ICourse): Promise<void> {
    const provider = new firebase.auth.FacebookAuthProvider();
    return this.afAuth
      .signInWithPopup(provider)
      .then(async (result: UserCredential) => {
        if (result.user) {
          const doc = await this.firebaseService.docExists(`/users/${result.user.uid}/`);
          if (!doc && result.additionalUserInfo?.profile) {
            const user: IUser = {
              uid: result.user.uid,
              email: result.user.email,
              displayName: result.user.displayName,
              photoURL: result.user.photoURL,
            };
            await this.userService.processNewUser(
              user,
              // Element implicitly has an 'any' type because expression of type '"first_name"' can't be used to index type 'Object'.
              result.additionalUserInfo.profile['first_name'],
              // Element implicitly has an 'any' type because expression of type '"last_name"' can't be used to index type 'Object'.
              result.additionalUserInfo.profile['last_name']
            );
          }
          if (course) {
            this.builderSignIn(course, result.user.uid);
          }
        }
      })
      .catch((error: { message: string }) => {
        this.toastrService.warning('Something has gone wrong. Please try again.', 'Oops!');
        this.logger.debug('An error occurred during Facebook Sign In');
        this.logger.error(error.message);
        throw error;
      });
  }

我在 Firebase 中查找了 AdditionalUserInfo 的类型，但在 result.additionalUserInfo.profile 中似乎没有明确的 first_name 或 last_name 嵌套定义。

  type AdditionalUserInfo = {
    isNewUser: boolean;
    profile: Object | null;
    providerId: string;
    username?: string | null;
  };

有什么办法可以解决这个问题并解决我面临的问题？我是否需要创建一个自定义类型来扩展 Firebase 的类型，如果是这种情况，最好的方法是什么？