How to reference access_token from chained request

Hi!

I’m trying to figure out how to obtain an access token and then specify it in the header of my next request.  I have specified “Authentication URL” but can’t seem to reference the access_token in my second request.  i found something that say i should format my “headers to send with every request” to the following, but it’s now working. 


Authorization: : ""basic “” + {$Auth.Response.Body.access_token}


Any help would be greatly appreciated.