Yes, it is possible to redirect a user to the registration page through Ory Hydra, but it's important to understand that Hydra itself doesn't handle user registration directly. Instead, it works in conjunction with other components in the Ory ecosystem. Ory Hydra is primarily an OAuth 2.0 and OpenID Connect provider [Ory Hydra case study](https://www.ory.sh/docs/hydra/case-study). It doesn't manage user accounts or handle registration flows directly. However, it can be integrated with Ory Kratos, which is responsible for identity management, including user registration. When a user needs to register during an OAuth2 flow initiated by Hydra, the process typically follows these steps: 1. The OAuth2 flow is initiated through Hydra. 2. If the user is not authenticated, Hydra will redirect to a login provider URL. 3. The login provider (which you implement) can check if the user exists. If not, it can redirect to a registration page. 4. After successful registration (handled by Ory Kratos or your custom implementation), the user can be redirected back to continue the OAuth2 flow. This process is described in the [User login and consent flow](https://www.ory.sh/docs/oauth2-oidc/custom-login-consent/flow#flow-steps) documentation for Hydra. To implement this, you would need to: 1. Set up Ory Hydra for OAuth2/OpenID Connect. 2. Implement a login provider that can redirect to registration when needed. 3. Implement a registration flow (possibly using Ory Kratos). 4. Ensure proper redirection back to Hydra after successful registration. Remember, the exact implementation details will depend on your specific setup and requirements. If you need more detailed information about implementing registration, you might want to look into the Ory Kratos documentation, as it's the component specifically designed for identity management and registration flows.