title: How to automate Rest apis testing using Postman Collection Runner, if header of each test cases require fresh token
body: <p>JWT Token(having fix time duration(about 1 hr))  is needed inside Header of Postman to test Rest-apis. How to automate such test cases if it require token having fix time duration. 
  I have written approx 30 test cases,if I run my test cases using Collection runner inside Postman, most of the test cases will be failed,because it does not include fresh tokens inside each test cases.</p>