Adds a permission to the specified app.
When users install your app on a site, it requests this permission.
Important: Disregard the Authentication note below. You can only call this method by authenticating with an account-level API key.
This method may require higher-level permissions than the caller has, based on their identity and roles and permissions. In these cases, you can ensure the method is called with the required level of authorization by using one of the following:
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.