Ticket #44707: 44707.2.patch

function wp_create_user_request( $email_address = '', $action_name = '', $request_data = array() ) {
        $email_address = sanitize_email( $email_address );
        $action_name   = sanitize_key( $action_name );

        if ( ! is_email( $email_address ) ) {
                return new WP_Error( 'invalid_email', __( 'Invalid email address.' ) );
        }

        if ( ! $action_name ) {
                return new WP_Error( 'invalid_action', __( 'Invalid action name.' ) );
        }

        $user    = get_user_by( 'email', $email_address );
        $user_id = $user && ! is_wp_error( $user ) ? $user->ID : 0;

        // Check for duplicates.
        $requests_query = new WP_Query( array(
                'post_type'     => 'user_request',
                'post_name__in' => array( $action_name ),  // Action name stored in post_name column.
                'title'         => $email_address, // Email address stored in post_title column.
-               'post_status'   => 'any',
+               'post_status'   => array('request_pending', 'request_confirmed'),
                'fields'        => 'ids',
        ) );

        if ( $requests_query->found_posts ) {
                return new WP_Error( 'duplicate_request', __( 'A request for this email address already exists.' ) );
        }

        $request_id = wp_insert_post( array(
                'post_author'   => $user_id,
                'post_name'     => $action_name,
                'post_title'    => $email_address,
                'post_content'  => wp_json_encode( $request_data ),
                'post_status'   => 'request-pending',
                'post_type'     => 'user_request',
                'post_date'     => current_time( 'mysql', false ),
                'post_date_gmt' => current_time( 'mysql', true ),
        ), true );

        return $request_id;
}