Status code: 401: unauthorized for JWT Auth Sample App IOS

Hi All,

I was trying to get access token using client id and secret for the iOS JWT Auth Sample app but i am gettting this error . pls help me to resolve the issue.

◁ Status code: 401: unauthorized

◁ Headers: 

    ◁ box-request-id, Value: 0e45db19b27e85456439b8868c47c8aa1

    ◁ Www-Authenticate, Value: Bearer realm="Service", error="invalid_token", error_description="The access token provided is invalid."

    ◁ x-envoy-upstream-service-time, Value: 5

    ◁ Date, Value: Mon, 11 Oct 2021 05:49:02 GMT

    ◁ Strict-Transport-Security, Value: max-age=31536000