既存の認証システム（Laravel）と Google OAuth をスムーズに統合

「Google でログイン」
↓
「複数アカウントから選択」
↓
GIS は OAuth フローをトリガーし、ユーザーの代わりにデータアクセス用のトークンを返します。


例）
フロント
↓
app\Http\Controllers\Api\GoogleAuthController.php
↓
レスポンスでURL

ubuntu@ip-172-26-6-105:/var/www/vue$ cat /etc/nginx/sites-available/vue
server { listen 8080; server_name laravel-rds-app.bizlabo.site;
    
    root /var/www/vue; index index.html;
    
    location / { try_files $uri $uri/ /index.html;
    }
}
# 旧設定（IPアドレス直接アクセス用）
server { listen 8080; server_name 54.178.81.51;
    
    root /var/www/vue; index index.html;
    
    location / { try_files $uri $uri/ /index.html;
    }
}

sudo nginx -t
sudo systemctl restart nginx

fetch('http://54.178.81.51/api/auth/google/callback' + window.location.search)
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err))

↓

Mixed Content: The page at 'https://accounts.google.com/...' 
was loaded over HTTPS, but requested an insecure resource 
'http://54.178.81.51/api/auth/google/callback...'. 
This request has been blocked; the content must be served over HTTPS.

# snapd をインストール（Certbot に必要）
sudo apt update
sudo apt install snapd -y

# snapd を最新化
sudo snap install core
sudo snap refresh core

# Certbot をインストール
sudo snap install --classic certbot

# certbot コマンドを使えるようにする
sudo ln -s /snap/bin/certbot /usr/bin/certbot

ubuntu@ip-172-26-6-105:~$ sudo certbot --nginx -d laravel-rds-app.bizlabo.site
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Enter email address or hit Enter to skip.
 (Enter 'c' to cancel): 10121012tt@gmail.com

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Please read the Terms of Service at:
https://letsencrypt.org/documents/LE-SA-v1.6-August-18-2025.pdf
You must agree in order to register with the ACME server. Do you agree?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: y

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Would you be willing, once your first certificate is successfully issued, to
share your email address with the Electronic Frontier Foundation, a founding
partner of the Let's Encrypt project and the non-profit organization that
develops Certbot? We'd like to send you email about our work encrypting the web,
EFF news, campaigns, and ways to support digital freedom.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: n
Account registered.
Requesting a certificate for laravel-rds-app.bizlabo.site

Successfully received certificate.
Certificate is saved at: /etc/letsencrypt/live/laravel-rds-app.bizlabo.site/fullchain.pem
Key is saved at:         /etc/letsencrypt/live/laravel-rds-app.bizlabo.site/privkey.pem
This certificate expires on 2026-02-16.
These files will be updated when the certificate renews.
Certbot has set up a scheduled task to automatically renew this certificate in the background.

Deploying certificate
Successfully deployed certificate for laravel-rds-app.bizlabo.site to /etc/nginx/sites-enabled/vue
Congratulations! You have successfully enabled HTTPS on https://laravel-rds-app.bizlabo.site

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
If you like Certbot, please consider supporting our work by:
 * Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
 * Donating to EFF:                    https://eff.org/donate-le
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
ubuntu@ip-172-26-6-105:~$