Certificate codess assigned in order starting from a given number

Good day, We need a certificate shortcode that awards certificates 1 by 1,  starting from a given number. Example: Certificate number 001 then next certificate number awarded is 002, then 003, then 004, etc. as of WPLMS 3.4.2  we have shortcodes that give out certificate codes like this: {{site}} : Use this to display Site Name {{userid}} : Use this to display User ID {{courseid}} : Use this to display Course ID {{courseslug}} : Use this to display Course Slug {{instructorid}} : Use this to display Course ID {{month}} : Use to display month in numeric MM {{year}} : Use to display year in numeric YYYY {{n}} : Use to display unique certificate ID yet there is NO shortcode that can count 1 by 1?