Sign in with Google
SUMUN uses Google OpenID Connect for account sign-in.

- Select Log In in the SUMUN header.
- Continue to Google and choose the account you want to use.
- After successful authentication, SUMUN returns you to the original page or My Page.
Signing in is required for API key management and usage history. It is not required to search a public contract or read a public report.
SUMUN uses an HttpOnly session cookie for the browser session. OpenID provider access and refresh tokens are not exposed to frontend JavaScript.