> For the complete documentation index, see [llms.txt](https://oten.gitbook.io/identity-support/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://oten.gitbook.io/identity-support/user-guide/account-management/authentication.md).

# Authentication

- [Sign up with Email and Password](https://oten.gitbook.io/identity-support/user-guide/account-management/authentication/sign-up-with-email-and-password.md)
- [Sign up with Google (optional)](https://oten.gitbook.io/identity-support/user-guide/account-management/authentication/sign-up-with-google-optional.md)
- [Sign in with Email and Password](https://oten.gitbook.io/identity-support/user-guide/account-management/authentication/sign-in-with-email-and-password.md)
- [Google OIDC: Sign in to Google via Oten](https://oten.gitbook.io/identity-support/user-guide/account-management/authentication/google-oidc-sign-in-to-google-via-oten.md)
- [Password requirements enforcement](https://oten.gitbook.io/identity-support/user-guide/account-management/authentication/password-requirements-enforcement.md)
- [Secure password hashing and storage](https://oten.gitbook.io/identity-support/user-guide/account-management/authentication/secure-password-hashing-and-storage.md)