Yes, there is a sample implementation on how to integrate Ory Hydra with a React application. Here are the steps: 1. Set the environment variable to the exposed port:

bash export ORY_SDK_URL=<http://localhost:4433>

2. Start the React development server:

bash npm run start

3. Then open

<http://localhost:3000>

in your browser. After loading, you will be presented with Ory's Sign In page. Click on sign up and create your first user. You can find more details in the [Ory documentation](https://www.ory.sh/docs/getting-started/integrate-auth/react#run-your-react-app). If you're still having trouble, make sure your client ID and client secret are correct. You can check your registered clients with the following command:

bash hydra list clients --endpoint <http://127.0.0.1:4445>

If you see an error message like

Error: invalid_client Description: Client authentication failed (for example, unknown client, no client authentication included, or unsupported authentication method) Hint: The requested OAuth 2.0 Client doesn't exist.

, it means that your client ID or client secret might be incorrect. You can find more details in the [Ory documentation](https://www.ory.sh/docs/hydra/self-hosted/gitlab#client-wrong). If you're trying to register an OAuth2 and OpenID Connect client, you can use the SDK or REST API. Here's a sample code on how to do it:

javascript import { Configuration, OidcApi } from "@ory/client"      const ory = new OidcApi(    new Configuration({    basePath: `https://${process.env.ORY_PROJECT_SLUG}.<http://projects.oryapis.com|projects.oryapis.com>`,    accessToken: process.env.ORY_API_KEY,    }),   )      export async function createOidcDynamicClient() {    const { data } = await ory.createOidcDynamicClient({    oAuth2Client: {    grant_types: ["authorization_code", "refresh_token"],    redirect_uris: ["<https://example.com>"],    scope: "offline openid",    token_endpoint_auth_method: "client_secret_post",    },    })       console.log(data.registration_access_token) // Write this down, it is only sent once!    console.log(data.client_id, data.client_secret /* ... */)   }

You can find more details in the [Ory documentation](https://www.ory.sh/docs/hydra/guides/oauth2-clients#register-oauth2-and-openid-connect-clients).