* The value is, e.g. admin <br>
     * comment: Initial password for the index user.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexUserInitialPassword();

    /**
     * Get the value for the key 'index.field.favorite_count'. <br>
     * The value is, e.g. favorite_count <br>
     * comment: Field name for favorite count in the index.