account-signin.php

<?php
/**
 * In job listing creation flow, this template shows above the job creation form.
 *
 * This template can be overridden by copying it to yourtheme/job_manager/account-signin.php.
 *
 * @see         https://wpjobmanager.com/document/template-overrides/
 * @author      Automattic
 * @package     WP Job Manager
 * @category    Template
 * @version     1.29.1
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly
}
?>
<?php if ( is_user_logged_in() ) : ?>

    <fieldset>
        <label><?php _e( 'Your account', 'wp-job-manager' ); ?></label>
        <div class="field account-sign-in">
            <?php
                $user = wp_get_current_user();
                printf( __( 'You are currently signed in as <strong>%s</strong>.', 'wp-job-manager' ), $user->user_login );
            ?>

            <!--<a class="button" href="<?php echo apply_filters( 'submit_job_form_logout_url', wp_logout_url( get_permalink() ) ); ?>"><?php _e( 'Sign out', 'wp-job-manager' ); ?></a>-->
        </div>
    </fieldset>

<?php else :
    $account_required            = job_manager_user_requires_account();
    $registration_enabled        = job_manager_enable_registration();
    $registration_fields         = wpjm_get_registration_fields();
    $use_standard_password_email = wpjm_use_standard_password_setup_email();
    ?>
    <fieldset>
        <label><?php _e( 'Have an account?', 'wp-job-manager' ); ?></label>
        <div class="field account-sign-in">
<?php //THIS IS THE CHANGED CODE************************?>
            <a class="button" data-toggle="modal" data-target="#sign-up-modal"><?php _e( 'Sign in', 'wp-job-manager' ); ?></a>
<?php //END CODE ************************?>
            <?php if ( $registration_enabled ) : ?>

                <?php printf( __( 'If you don&rsquo;t have an account you can %screate one below by entering your email address/username.', 'wp-job-manager' ), $account_required ? '' : __( 'optionally', 'wp-job-manager' ) . ' ' ); ?>
                <?php if ( $use_standard_password_email ) : ?>
                    <?php printf( __( 'Your account details will be confirmed via email.', 'wp-job-manager' ) ); ?>
                <?php endif; ?>

            <?php elseif ( $account_required ) : ?>

                <?php echo apply_filters( 'submit_job_form_login_required_message',  __('You must sign in to create a new listing.', 'wp-job-manager' ) ); ?>

            <?php endif; ?>
        </div>
    </fieldset>
    <?php
    if ( ! empty( $registration_fields ) ) {
        foreach ( $registration_fields as $key => $field ) {
            ?>
            <fieldset class="fieldset-<?php echo esc_attr( $key ); ?>">
                <label
                    for="<?php echo esc_attr( $key ); ?>"><?php echo $field[ 'label' ] . apply_filters( 'submit_job_form_required_label', $field[ 'required' ] ? '' : ' <small>' . __( '(optional)', 'wp-job-manager' ) . '</small>', $field ); ?></label>
                <div class="field <?php echo $field[ 'required' ] ? 'required-field' : ''; ?>">
                    <?php get_job_manager_template( 'form-fields/' . $field[ 'type' ] . '-field.php', array( 'key'   => $key, 'field' => $field ) ); ?>
                </div>
            </fieldset>
            <?php
        }
        do_action( 'job_manager_register_form' );
    }
    ?>
<?php endif; ?>