Regarding JQuery : Async Function

Question

I have  two function in Jquery , i am calling it one by one. please find below code for example.. 

 

CheckDuplicateUsers ();

ManageUsers(); 

 

First CheckDuplicateUsers() function will get call  and ManageUsers() function should get call once first function get complete execution. 

 

My issue is before completing first function its going to another function. i want to resolve this.

 

Kindly help me for this as i am new in Jquery.