Based on the available knowledge sources, Ory allows you to enable social sign-in with Google (and other providers) by configuring the OIDC method in your project. However, the documentation does not explicitly state whether you can enable Google social sign-on (login) without also enabling user registration. The typical flow described for social sign-in is that if a user signs in with Google for the first time, a new account is automatically created—this is effectively a registration step. The configuration examples for enabling OIDC/social sign-in are always shown in the context of both login and registration flows, and there is no clear documentation on separating login from registration for social providers. Additionally, there is no explicit mention of a configuration option to allow social login only for pre-existing users while blocking new user registration via Google or other social providers. Therefore, based on the current documentation, it appears that enabling Google social sign-on will also allow new users to register via Google. There is not enough information in the knowledge sources to confirm that you can enable Google social sign-on exclusively for login without also enabling registration for new users via Google. If you have a strict requirement to prevent new user registration (including via social sign-in), you may need to implement additional controls or workarounds, but these are not described in the provided documentation sources. If this is a critical use case, you may want to reach out to Ory support or community channels for further clarification.
Summary: The knowledge sources do not explicitly mention a way to enable Google social sign-on without also enabling user registration via Google. Enabling social sign-in appears to allow both login and registration for users via Google and other providers [Social sign-in overview](
https://www.ory.sh/docs/kratos/social-signin/overview) [User registration with OIDC](
https://www.ory.sh/docs/kratos/self-service/flows/user-registration#registration-with-google-facebook-github--openid-connect--oauth-20) [User login with OIDC](
https://www.ory.sh/docs/kratos/self-service/flows/user-login#login-with-google-facebook-github--openid-connect--oauth-20).