Solved Replace name by email to uniquely identify to user in Groups and Team
Sometime due to same name it can be a problem to uniquely identify a user while adding into groups or in team so it can be easily done in project by below step:
Locate path in your project:
open createSupportGroup.html and updateSupportGroup.html and make update as suggested below.
For group user new group create:
Write email in place of name like instead of agent.name write agent.email
For group user group update:
Do the same with other where you want to update.
@Sanjeev thanks for the information