OAuth2 token call to Exactonline

[Anonymous]

I'm trying to get the access codes/tokens from ExactOnline for a rest API. I successfully retrieved the access code, but when I try to request the token using a tRESTClient I'm getting a 400 Bad request message.  I am able to use Fiddler and get the token after getting the access code. Attached is my file. What am I doing wrong?  Any help greatly appreciated!

[Anonymous]

Hello
You can use tRest with post model to call the rest API to get the access token, I have used it successfully for a similar case.

Regards
Shong