////adapted from: https://support.metabox.io/topic/mb_user_profile_register-autocompletenew-password/
//relevant docs: https://docs.metabox.io/extensions/mb-user-profile/#form-fields-filters
function add_more_registration_fields( $fields ) {
        $fields = [
            'username'  => [
                'name'     => __( 'Username', 'mb-user-profile' ),
                'id'       => 'user_login',
                'type'     => 'text',
                'required' => true,
                'columns' => 6,
            ],
            'email'     => [
                'name'     => __( 'Email', 'mb-user-profile' ),
                'id'       => 'user_email',
                'type'     => 'email',
                'required' => true,
                'columns' => 6,
                'desc' => 'Used for account notifications and alerts (if opted-in).',
            ],
            'password'  => [
                'name'     => __( 'Password', 'mb-user-profile' ),
                'id'       => 'user_pass',
                'type'     => 'password',
                'required' => true,
                'columns' => 6,
                'password_strength' => 'medium',
                'desc'     => 'Choose a password with a strength of <b>Medium</b> or higher. <br><span id="password-strength" class="rwmb-password-strength"></span>',
                'attributes' => [
                    'autocomplete' => 'new-password'
                ]
            ],
            'password2' => [
                'name'     => __( 'Confirm Password', 'mb-user-profile' ),
                'id'       => 'user_pass2',
                'type'     => 'password',
                'required' => true,
                'password_strength' => 'medium',
                'columns' => 6,
            ],
            // ... add more fields here
        ];
        return $fields;
    }
add_filter( 'rwmb_profile_register_fields',  'add_more_registration_fields' );
//add this to the edit profile too

////https://docs.metabox.io/extensions/mb-user-profile/#edit-default-fields
//These fields need to be added this way instead of in the function preceding this one.
//See: https://support.metabox.io/topic/how-to-modify-deafult-fields-specifically-on-front-end-user-registration-form/#post-36704
add_filter( 'rwmb_meta_boxes', function( $meta_boxes ) {
    $meta_boxes[] = [
        'title'  => 'Default Fields',
        'id'     => 'default-fields',
        'type'   => 'user',
        'fields' => [
            [
                'id'   => 'first_name',
                'name' => 'First Name',
                'type' => 'text',
                  'required' => true,
                'columns' => 4,
            ],
            [
                'id'   => 'last_name',
                'name' => 'Last Name',
                'type' => 'text',
                  'required' => true,
                'columns' => 4,
            ],
            'phonenumber'  => [
            'name'     => __( 'Phone Number', 'mb-user-profile' ),
            'id'       => 'phonenumber',
            'type'     => 'tel',
            'required' => true,
            'desc' => 'Used for notifications and alerts (if opted-in).',
            'columns' => 4,
            //'mask' => '(999) 999-9999'
            ],
          /*  [
                'id'   => 'display_name',
                'name' => 'Display Name',
                'type' => 'text',
            ],
            [
                'id'   => 'description',
                'name' => 'Biography',
                'type' => 'textarea',
            ],*/
        ],
        'validation' => [
            'rules'  => [
                'phonenumber' => [
                    'phoneUS'  => true,
                    //'minlength' => 7,
                ],
                // Rules for other fields
            ],
            'messages' => [
                'phonenumber' => [
                    'phoneUS' => "Please enter a valid US phone number.
                    <br><b>Examples:</b>
                        <ul>
                        <li>5555555555</li>
                        <li>(555) 555-5555</li>
                        <li>555-555-5555</li>
                        </ul>"
                ],
                // Error messages for other fields
            ],
        ],
    ];
    return $meta_boxes;
} );