Extra registration fields -> Into database?

Below you see a screenshot and the code, I must have done something wrong as you can see in the database screenshot, the values of the extra fields are not added in the database, looks like there’s no contact ^^,

Does anyone have any clue what a codenoob like me have messed up? =)

How it looks
Database – nothing sadface
Code added in functions.php

add_action( 'register_form', 'myplugin_register_form' );
function myplugin_register_form() {

    $user_fname = ( ! empty( $_POST['user_fname'] ) ) ? trim( $_POST['user_fname'] ) : '';
    $user_lname = ( ! empty( $_POST['user_lname'] ) ) ? trim( $_POST['user_lname'] ) : '';
    $user_phone = ( ! empty( $_POST['user_phone'] ) ) ? trim( $_POST['user_phone'] ) : '';

        ?>
        <p>
            <label for="user_fname"><?php _e( 'First Name', 'mydomain' ) ?><br />
                <input type="text" name="user_fname" id="user_fname" class="input" value="<?php echo esc_attr( wp_unslash( $user_fname ) ); ?>" size="25" /></label>
        </p>
        <p>
            <label for="user_lname"><?php _e( 'Last Name', 'mydomain' ) ?><br />
                <input type="text" name="user_lname" id="user_lname" class="input" value="<?php echo esc_attr( wp_unslash( $user_lname ) ); ?>" size="25" /></label>
        </p>
        <p>
            <label for="user_phone"><?php _e( 'Mobile Number', 'mydomain' ) ?><br />
                <input type="text" name="user_phone" id="user_phone" class="input" value="<?php echo esc_attr( wp_unslash( $user_phone ) ); ?>" size="25" /></label>
        </p>
        <?php
    }

    //2. Add validation. In this case, we make sure user_fname is required.
    add_filter( 'registration_errors', 'myplugin_registration_errors', 10, 3 );
    function myplugin_registration_errors( $errors, $sanitized_user_login, $user_email ) {

        if ( empty( $_POST['user_fname'] ) || ! empty( $_POST['user_fname'] ) && trim( $_POST['user_fname'] ) == '' ) {
            $errors->add( 'user_fname_error', __( '<strong>ERROR</strong>: You must include a first name.', 'mydomain' ) );
        }
        if ( empty( $_POST['user_lname'] ) || ! empty( $_POST['user_lname'] ) && trim( $_POST['user_lname'] ) == '' ) {
            $errors->add( 'user_lname_error', __( '<strong>ERROR</strong>: You must include a last name.', 'mydomain' ) );
        }
        if ( empty( $_POST['user_phone'] ) || ! empty( $_POST['user_phone'] ) && trim( $_POST['user_phone'] ) == '' ) {
            $errors->add( 'user_phone_error', __( '<strong>ERROR</strong>: You must include a mobile number.', 'mydomain' ) );
        }

        return $errors;
    }

    //3. Finally, save our extra registration user meta.
    add_action( 'user_register', 'myplugin_user_register' );
    function myplugin_user_register( $user_id ) {
        if ( ! empty( $_POST['user_fname'] ) ) {
            update_user_meta( $user_id, 'user_fname', trim( $_POST['user_fname'] ) );
        }
        if ( ! empty( $_POST['user_lname'] ) ) {
            update_user_meta( $user_id, 'user_lname', trim( $_POST['user_lname'] ) );
        }
        if ( ! empty( $_POST['user_phone'] ) ) {
            update_user_meta( $user_id, 'user_phone', trim( $_POST['user_phone'] ) );
        }
    };