Evaluate the accessToken response
Now we issue this request to the accessToken endpoint, and if all is successful, you’ll get
something like the following URL encoded response:
The oauth_token ﬁeld is now your access token, and the oauth_token_secret will be used for
signing all requests on behalf of the member.
You’ll want to “hold on” to the oauth_token and oauth_token_secret for as long as you want to
act on the member’s behalf.
A LinkedIn member may specify that an access token is valid only for a certain period of time
(or forever), but can revoke access on LinkedIn.com at any time.
Getting an Access Token