To increase the length of username in orangehrm

To increase the length of username in orangehrm
C:\xampp\htdocs\orangehrm-3.0.1\symfony\plugins\orangehrmAdminPlugin\lib\form\systemuserform.php is edited for increased length

D:\xampp\htdocs\orangehrm-3.0.1\symfony\web\webres_513fd0981da216.38969927\orangehrmAdminPlugin\js\systemusersuccess.js

edit for more length

C:\xampp\htdocs\orangehrm-3.0.1\symfony\plugins\orangehrmLeavePlugin\modules\leave\templates\mail\en_US\apply

change the mail format