add user meta

<?php
/**
 * @return array
 */
function fw_my_user_options() {
	return array(
		'box' => array(
			'title'   => false,
			'type'    => 'box',
			'options' => array(
				'day'   => array(
					'type'  => 'short-text',
					'value' => '',
					'label' => __( 'Birth day', 'fw' ),
				),
				'month' => array(
					'type'    => 'short-select',
					'value'   => 'choice',
					'label'   => __( 'Select birth month', 'fw' ),
					'choices' => array(
						__( 'January' ),
						__( 'February' ),
						__( 'March' ),
						__( 'April' ),
						__( 'May' ),
						__( 'June' ),
						__( 'July' ),
						__( 'August' ),
						__( 'September' ),
						__( 'October' ),
						__( 'November' ),
						__( 'December' ),
					),
				),
				'year'  => array(
					'type'  => 'short-text',
					'value' => '',
					'label' => __( 'Birth year', 'fw' ),
				),
				'image' => [
					'type' => 'upload',
					'value' =>[],
					'label' => 'Upload file'
				]
			),
		),
	);
}

/**
 * Add new fields above 'Update' button.
 *
 * @param WP_User $user User object.
 */
function _action_fw_additional_profile_fields( $user ) {
	$data = (array) get_the_author_meta( 'fw-user-options', $user->ID );
	echo fw()->backend->render_options( fw_my_user_options(), $data );
}

add_action( 'show_user_profile', '_action_fw_additional_profile_fields' );
add_action( 'edit_user_profile', '_action_fw_additional_profile_fields' );

/**
 * Save profile fields.
 *
 * @param int $user_id
 *
 * @return  bool
 */
function _action_fw_save_profile_fields( $user_id ) {

	if ( ! current_user_can( 'edit_user', $user_id ) ) {
		return false;
	}
	return update_user_meta( $user_id, 'fw-user-options', fw_get_options_values_from_input( fw_my_user_options() ) );
}

add_action( 'personal_options_update', '_action_fw_save_profile_fields' );
add_action( 'edit_user_profile_update', '_action_fw_save_profile_fields' );