in server/src/jetbrains/buildServer/vsoRooms/notificator/VSOUserProperties.java [89:93]
public static boolean isCredentialsConfigured(@NotNull User user) {
final String userName = user.getPropertyValue(new NotificatorPropertyKey(Constants.NOTIFICATOR_TYPE, VSO_USERNAME_USER_PROPERTY_NAME));
final String password = user.getPropertyValue(new NotificatorPropertyKey(Constants.NOTIFICATOR_TYPE, VSO_PASSWORD_USER_PROPERTY_NAME));
return userName != null && !userName.isEmpty() && password != null && !password.isEmpty();
}