ClientMetadataResponse

{
    "grant_types_supported": [
        "authorization_code",
        "refresh_token"
    ],
    "response_types_supported": [
        "code"
    ],
    "scopes_supported": [
        "string"
    ],
    "code_challenge_methods_supported": [
        "S256",
        "plain"
    ],
    "token_endpoint_auth_methods_supported": [
        "client_secret_post"
    ]
}