Stop copying & pasting the response key value to your variable, and let's automate this action using the coming marvelous way with considering that you are returning a response similar to the below schema:

{
    "key": "success",
    "msg": "You have logged in successfully",
    "data": {
        "name": "Mahmoud Ramadan",
        "token": "1|7XJ3hr2HZmQD24D9fkKYrmPB6ivCo7b9imbUP7NA"
    }
}

At first, I will hypothesize that you have defined a `token` variable as a Global scope. Postman has multiple tabs under the URL input, especially the Tests tab, go ahead and open it, then write the next JavaScript code: