How to refresh Published API documentation

Here is my requirement,

  1. Our Api generates the swagger documentation.
  2. I wanted to use the swagger file from above step in postman to create documentation
  3. We add/modify the end points in API and which will have the updated swagger documentation all the time. But how do we updated the Postman documentation from the most recent swagger file changes? The postman documentation URL should not get change as we share this to end user. How to refresh the postman documentation without changing the URL. Please guide me the steps
  4. I have tried the steps mentioned In the below link and not working

Swagger Document version : 2.0

Please help me in this.