upload logo wordpress

function alts_customize_register( $wp_customize ) {
    $wp_customize->add_setting( 'alts_logo' ); // Add setting for logo uploader
         
    $wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, 'alts_logo', array(
        'label'    => __( 'Upload Logo (replaces text)', 'alts' ),
        'section'  => 'title_tagline',
        'settings' => 'alts_logo',
    ) ) );
}
add_action( 'customize_register', 'alts_customize_register' );