CF7 register user

cf7.php

function create_user_from_registration($cfdata) {
    if (!isset($cfdata->posted_data) && class_exists('WPCF7_Submission')) {
        // Contact Form 7 version 3.9 removed $cfdata->posted_data and now
        // we have to retrieve it from an API
        $submission = WPCF7_Submission::get_instance();
        if ($submission) {
            $formdata = $submission->get_posted_data();
        }
    } elseif (isset($cfdata->posted_data)) {
        // For pre-3.9 versions of Contact Form 7
        $formdata = $cfdata->posted_data;
    } else {
        // We can't retrieve the form data
        return $cfdata;
    }
    // Check this is the user registration form
    if ( $cfdata->title() == 'Alumni članstvo_copy') {
        $password = wp_generate_password( 12, false );
        $name = $formdata['alumni-ime'];
        $surname = $formdata['alumni-prezime'];

        $email = $formdata['alumni-email'];
        $email_show = $formdata['email-show-condition'];

        $faculty = $formdata['alumni-faculty'];
        $degree = $formdata['alumni-stepen'];

        $faculty_sing_in_date = $formdata['alumni-sing-in-faculty-date'];
        $faculty_sing_in_date_show = $formdata['sing-in-faculty-date-condition'];

        $job_company = $formdata['alumni-job-company'];
        $job_company_show = $formdata['job-company-condition'];

        $job_position = $formdata['alumni-job-position'];
        $job_position_show = $formdata['job-position-condition'];

        $avatar = $formdata['alumni-profile-image'];

        // Construct a username from the user's name
        $username = strtolower(str_replace(' ', '', $name));
        $name_parts = explode(' ',$name);
        if ( !email_exists( $email ) ) {
            // Find an unused username
            $username_tocheck = $username;
            $i = 1;
            while ( username_exists( $username_tocheck ) ) {
                $username_tocheck = $username . $i++;
            }
            $username = $username_tocheck;
            // Create the user
            $userdata = array(
                'user_login' => $username,
                'user_pass' => $password,
                'user_email' => $email,
                'nickname' => reset($name_parts),
                'display_name' => $name,
                'first_name' => reset($name_parts),
                'last_name' => $surname,
                'role' => 'alumni'
            );
            $user_id = wp_insert_user( $userdata );
            if ( !is_wp_error($user_id) ) {
                global $wpdb;

                update_user_meta( $user_id, 'email_show_condition', $email_show );
                update_user_meta( $user_id, 'alumni_faculty', $faculty );
                update_user_meta( $user_id, 'alumni_stepen', $degree );
                update_user_meta( $user_id, 'alumni_sing_in_faculty_date', $faculty_sing_in_date );
                update_user_meta( $user_id, 'sing_in_faculty_date_condition', $faculty_sing_in_date_show );
                update_user_meta( $user_id, 'alumni_job_company', $job_company );
                update_user_meta( $user_id, 'job_company_condition', $job_company_show );
                update_user_meta( $user_id, 'alumni_job_position', $job_position );
                update_user_meta( $user_id, 'job_position_condition', $job_position_show );

                update_user_meta( $user_id, 'alumni_profile_image', $img_id );
            }
        }
    }
    return $cfdata;
}
add_action('wpcf7_before_send_mail', 'create_user_from_registration', 1);