curl -X POST \
-H "Content-Type: application/json" \
-d '{
"client_name": "My Client",
"redirect_uris": ["https://example.com/callback"],
"grant_types": ["authorization_code", "refresh_token"],
"response_types": ["code"],
"token_endpoint_auth_method": "client_secret_basic"
}' \
https://your-oidc-provider.com/reg