STUCK on Step 3: Generate Access Token and Refresh Token

STUCK on Step 3: Generate Access Token and Refresh Token

Hi support team,

I'm able to get the code variable from step 2.
Using:
https://accounts.zoho.com/oauth/v2/auth?scope=ZohoCRM.users.ALL&client_id={client_id}
&response_type=code&access_type={"offline"or"online"}&redirect_uri={redirect_uri}


But no matter what I do, I got an error when I try to do a post request to the url on 
The step 3 of the developer guide,
https://accounts.zoho.com/oauth/v2/token? code={grant_token}&redirect_uri={redirect_uri}&client_id={client_id}&client_secret={client_secret}&grant_type=authorization_code




Uh, oh!
Server error occurred
Looks like you typed an incorrect address
Or
the URL you clicked is invalid.
If you still feel the URL is correct, please send us a mail to   support@zohoaccounts.com


I'm wondering if there's a problem with this request URL in particular.

Regards