以下の3つで指定されているURLのみポストできる。
- Canvas URL
- Website URL
- App domainのサブドメイン
One or more of the given URLs is not allowed by the Stream post URL security app setting. It must match the Website URL or Canvas URL, or the domain must be a subdomain of one of the App's domains. Read more about Login Security to learn more about app settings related to security.