Sure, to use the

oAuth2Authorize

method to authorize a client application in your own UI, you need to make a GET request to the

/oauth2/auth

endpoint. However, the Ory SDK is not yet able to handle this endpoint properly. Here's a general example of how you might use this endpoint in a web server application: 1. First, create an OAuth2 client using the Ory CLI:

bash ory create oauth2-client --token-endpoint-auth-method none

2. Then, construct the authorization URL with the required parameters:

javascript const clientId = "your_client_id" const authorizationUrl = `https://$<http://PROJECT_SLUG.projects.oryapis.com/oauth2/auth?response_type=code&client_id=${clientId}&redirect_uri=https://myapp.com/callback&scope=openid%20offline_access&state=12345|PROJECT_SLUG.projects.oryapis.com/oauth2/auth?response_type=code&client_id=${clientId}&redirect_uri=https://myapp.com/callback&scope=openid%20offline_access&state=12345>`

3. Redirect the user to the Authorization Server to start the authorization flow:

javascript window.location = authorizationUrl

4. After the user has granted permission, you will receive an authorization code. You can then exchange this code for a token:

javascript const clientSecret = "your_client_secret" const code = "authorization_code_received_from_auth_server" const tokenUrl = "https://$<http://PROJECT_SLUG.projects.oryapis.com/oauth2/token|PROJECT_SLUG.projects.oryapis.com/oauth2/token>" const requestBody = `grant_type=authorization_code&client_id=${clientId}&client_secret=${clientSecret}&code=${code}&redirect_uri=<https://myapp.com/callback>`  fetch(tokenUrl, {   method: "POST",   headers: { "Content-Type": "application/x-www-form-urlencoded" },   body: requestBody, })   .then((response) => response.json())   .then((data) => console.log(data))   .catch((error) => console.error(error))

Please note that this is a general example and the actual implementation may vary depending on your specific use case and programming language. For more information, you can refer to the [Ory Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api) and the [Ory OAuth2 and OpenID Connect Documentation](https://www.ory.sh/docs/oauth2-oidc/authorization-code-flow#examples).

When implementing your own UI for OAuth2 flow, there are several steps you need to follow: 1. Create an OAuth2 client: This is a necessary step to enable your application to use OAuth2 flows. You must register your application with the service you plan to integrate with. This is done through a registration form in the developer or API portion of the service's website, where you provide the following information about your application: - Application name - Application website - Redirect URI or callback URL ([source](https://www.ory.sh/docs/oauth2-oidc/overview/oauth2-concepts#creating-oauth2-clients)) 2. Create a Login Flow: You need to create a login flow for your application. This involves creating a JSON file with the necessary information such as the type of flow (browser or API), the expiry time, and the UI nodes required to render the form ([source](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration#create-login-flow)). 3. Handle Redirects: If the user grants permission, the Authorization Server generates an authorization code and redirects the user back to the requesting application with the authorization code ([source](https://www.ory.sh/docs/oauth2-oidc/authorization-code-flow#step-3-redirect-back-to-the-app)). 4. Get an OpenID Connect ID Token and Validate It: To obtain an ID token, you need to include the

openid

scope in the access request. The ID token is a JSON Web Token (JWT) that contains information about the authenticated user. The ID token can be used to obtain information about the user such as their name and email address ([source](https://www.ory.sh/docs/oauth2-oidc/authorization-code-flow#get-an-openid-connect-id-token-and-validate-it)). 5. Handle Refresh Tokens: If you're using a custom UI for the consent screen, it's essential to include the

offline_access

scope in the list of

grant_scope

for a refresh token to be returned ([source](https://www.ory.sh/docs/oauth2-oidc/refresh-token-grant#custom-consent-ui)). 6. Implement UI for Single-Page Applications (SPA) or Native Applications: Depending on your application type, you may need to handle AJAX or fetch requests for SPAs or use API flows for native applications ([source](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration#single-page-application), [source](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration#native-application)). Remember, it's important to ensure that the redirect URI or callback URL is correctly specified during the registration process, as it's a critical part of OAuth2 flows. Without a correctly specified redirect URI, OAuth2 flows can't be completed successfully, resulting in an error for the user.

Sure, the callback URL (also known as the redirect URI) is specified when you create an OAuth2 client. Here's an example of how to do this using the Ory CLI:

bash ory create oauth2-client --project "$PROJECT_ID" \   --name "Ory Docs OAuth2 Integration Example Client" \   --grant-type authorization_code,refresh_token,client_credentials \   --response-type code \   --scope openid --scope offline_access --scope email \   --redirect-uri <http://localhost:3000/callback>

In this example,

<http://localhost:3000/callback>

is the callback URL. You should replace this with the URL of your app's callback endpoint. After creating the client, you can export the client ID and secret for use in your application:

bash export OAUTH_CLIENT_ID="{set to the client ID from output}" export OAUTH_CLIENT_SECRET="{set to the client secret from output}"

For more information, you can refer to the [Ory Documentation](https://www.ory.sh/docs/getting-started/oauth2-openid/add-oauth2-openid-connect-nodejs-expressjs#prerequisites).

Sure, in a self-hosted setup, you would typically specify the callback URL (redirect URI) in the configuration file for your OAuth2 client. For Ory Hydra, the configuration file is usually in YAML format. However, the specific location where you specify the redirect URI depends on the structure of your configuration file. Here's an example of how you might specify the redirect URI in a configuration file:

yaml clients:   - id: my-client     secret: secret     redirect_uris:       - <http://localhost:3000/callback>     grant_types:       - authorization_code       - refresh_token     response_types:       - code     scope: openid offline_access email

In this example,

<http://localhost:3000/callback>

is the callback URL. You should replace this with the URL of your app's callback endpoint. Please note that this is a general example and the actual implementation may vary depending on your specific use case and configuration. For more information on configuring Ory Hydra, you can refer to the [Ory Hydra Configuration Documentation](https://www.ory.sh/docs/hydra/reference/configuration).