To create OAuth 2.0 clients in Hydra using the

admin/clients

endpoint, you need to set several fields in addition to

client_id

and

client_secret

. Here's an overview of some important fields and an example request: Important fields to consider: 1. `client_name`: A human-readable name for the client. 2. `grant_types`: The OAuth 2.0 grant types the client can use. 3. `response_types`: The OAuth 2.0 response types the client can use. 4. `scope`: The scopes the client is allowed to request. 5. `redirect_uris`: The allowed redirect URIs for the client. 6. `token_endpoint_auth_method`: The authentication method for the token endpoint. Example request:

json {   "client_id": "your-client-id",   "client_secret": "your-client-secret",   "client_name": "My Example Client",   "grant_types": ["authorization_code", "refresh_token"],   "response_types": ["code", "id_token"],   "scope": "openid profile email",   "redirect_uris": ["<https://my-app.com/callback>"],   "token_endpoint_auth_method": "client_secret_basic" }

This is a basic example, and you can include additional fields based on your specific requirements. For a complete list of available fields and their descriptions, you can refer to the [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api). When making the request, you would send a POST request to the

/admin/clients

endpoint with the JSON payload containing these fields. Remember that some fields are optional, and the exact configuration will depend on your specific use case and security requirements.

The

owner

field is indeed an optional field that can be set when creating or updating an OAuth 2.0 client in Hydra. Here's what you need to know about it: The

owner

field is used to identify the owner of the OAuth 2.0 client. It's a string that can be used to associate the client with a particular entity or user in your system. According to the [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api), the

owner

field is described as: "OAuth 2.0 Client Owner Owner is a string identifying the owner of the OAuth 2.0 Client." You can include the

owner

field in your request when creating a new OAuth 2.0 client. Here's an example of how you might include it in your JSON payload:

json {   "client_id": "your-client-id",   "client_secret": "your-client-secret",   "client_name": "My Example Client",   "owner": "user123",   "grant_types": ["authorization_code", "refresh_token"],   "response_types": ["code", "id_token"],   "scope": "openid profile email",   "redirect_uris": ["<https://my-app.com/callback>"],   "token_endpoint_auth_method": "client_secret_basic" }

It's worth noting that the

owner

field can also be used as a filter when listing OAuth 2.0 clients. As mentioned in the [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api) for the

listOAuth2Clients

method, there's a query parameter: "owner: The owner of the clients to filter by." This means you can use the

owner

field to organize and retrieve clients based on ownership, which can be useful for managing multiple clients in a multi-tenant system or for organizational purposes.