ArcGISIdentityManager.validateAppAccess does not consider custom portal URL

[ReneU]

It looks like an instance of ArcGISIdentityManager that uses a custom portal url will still make a request to www.arcgis.com/sharing/rest/oauth2/validateAppAccess when calling instance.validateAppAccess(myClientId).

Shouldn't this instead try to validate the user's app access against the configured portal? I can see that my manager's portal property is set to my custom portal url after creating it via deserialize({ portal: 'myCustomUrl', ... })

From looking at the code it might be enough to pass the third parameter (portal: string) to validateAppAccess:

arcgis-rest-js/packages/arcgis-rest-request/src/ArcGISIdentityManager.ts

Lines 1193 to 1197 in 090e3a5

	public validateAppAccess(clientId: string): Promise<IAppAccess> {
	return this.getToken(this.portal).then((token) => {
	return validateAppAccess(token, clientId);
	});
	}

I'm happy to work on a fix for this if someone can confirm that this is a bug.