knigopis/app/src/main/res/menu/options.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/option_login"
        android:visible="false" />

    <item
        android:id="@+id/option_about"
        android:title="@string/option_about"
        app:showAsAction="never" />

</menu>