Saving a Postman collection variable from he response body - api

Question

Trying to figure out why I cannot get this to work? Also, console does not give much of a result.
Scenario:
Making the POST request to get the response with TOKEN
Save the response token to collection variable (as the collection file will be used for importing to another testing solution in the cloud)
Using that collection variable to log out from the session
So, I need to be able to store this as a collection variable and use that token when logging out from the session/DELETE the API admin session.
Error in the console:
There was an error in evaluating the test script: JSONError: Unexpected token 'o' at 1:2 [object Object] ^
Tests:
var response = pm.response.json()
var jsonData = JSON.parse(response)
pm.collectionVariables.set("token", jsonData.response.token);
Response body:
{
"response": {
"token": "***"
},
"messages": [
{
"code": "0",
"text": "OK"
}
]
}
Thank you very much for any advice!

Answer 1

JSON.parse(responseBody) always gets a json representation of the response.
A complete fail safe approach would be:
pm.test("response is ok", ()=>{
pm.response.to.have.status(200)
})
var jsonData = JSON.parse(responseBody);
postman.setEnvironmentVariable("token", jsonData.token);

Answer 2

Here's the approach i used.
Send the request
Check if there response is 200
If it's true set the token
pm.test("response is ok", ()=>{
if( pm.response.to.have.status(200)){
var jsonData = JSON.parse(responseBody);
postman.setEnvironmentVariable("token", jsonData.token);
}
})
You need to change your status code depending on the condition.
Hope it helps