{"authorization_endpoint": "https://app.close.com/oauth2/authorize/", "code_challenge_methods_supported": ["S256"], "grant_types_supported": ["authorization_code", "refresh_token"], "issuer": "https://api.close.com", "registration_endpoint": "https://api.close.com/oauth2/register/", "response_modes_supported": ["query"], "response_types_supported": ["code"], "revocation_endpoint": "https://api.close.com/oauth2/revoke/", "token_endpoint": "https://api.close.com/oauth2/token/", "token_endpoint_auth_methods_supported": ["none", "client_secret_basic", "client_secret_post"]}