Ory Hydra is designed to connect to your existing identity management system. It is not an identity management system itself, but it can integrate with your existing system, whether it's a MySQL+PHP login service, a Federated SAML SSO, or another system. Ory Hydra is capable of issuing access, refresh, and ID tokens in a secure and OpenID Certified manner. To connect your existing identity management to Ory Hydra, you would typically need to configure Ory Hydra to communicate with your identity management system. Unfortunately, the provided knowledge sources do not include specific instructions or code examples for this process. The exact steps can vary depending on the specifics of your identity management system and your technical requirements. For more detailed instructions, you may want to refer to the [Ory Hydra documentation](https://www.ory.sh/docs/ecosystem/projects#ory-hydra).