requestAuthCredentials Last update: 16.07.2025 abstract fun requestAuthCredentials(uri: String, isFailedAttempt: Boolean, username: ValueHolder<String>, password: ValueHolder<String>, savePassword: ValueHolder<Boolean>): Boolean Called when ModelCenter needs to request a username and password. Return true if username/password is submitted, false otherwise Parameters uri URI authenticating to isFailedAttempt true if request is due to previous failed attempt, false otherwise username username to use (inout) password password to use (inout) savePassword true if password should be saved, false otherwise (inout) Throws ModelCenterException