isKeyUser() {
			return InitialFlexAPI.isKeyUser();
		}
Checks if key user rights are available for the current user.
Application developers can use this API to decide if the key user adaptation
feature should be visible to the current user. This only applies if key user adaptation
should be handled standalone without an SAP Fiori launchpad.

@returns {Promise<boolean>} Resolves to a boolean indicating if the key user role is assigned to the user
@public