# Google Auth

- https://developers.google.com/identity/protocols/OAuth2


## procedure
1. OAuth 2.0 credentials 획득 the Google Developers Console.
2. Obtain an access token from the Google Authorization Server.
3. Send the access token to an API.
4. Refresh the access token, if necessary.

## oauth2 mechanism
<img src="images/webflow.webp" alt="Using OAuth 2.0 for Installed Applications">
image from: https://developers.google.com/identity/protocols/OAuth2InstalledApp


## 참고
- Login with Google using PHP
- https://www.sanwebe.com/2012/11/login-with-google-api-php