"error":"invalid_redirect_uri"

"error":"invalid_redirect_uri"

Hi,

1. I have created a client app at https://accounts.zoho.com/developerconsole using dummy redirect url http://127.0.0.1:8080/
2. I then followed the instructions at https://www.zoho.com/crm/developer/docs/api/auth-request.html to generate a grant token using the self client option.
3. I then attempted to create an auth token following the instructions at https://www.zoho.com/crm/developer/docs/api/access-refresh.html with the following HTTP POST


4. I receive the response "{"error":"invalid_redirect_uri"}" which is of course correct. It is invalid because it is a dummy which was what the instruction said to enter.

The page https://help.zoho.com/portal/community/topic/redirect-url says that "If you don't have a redirect URL, in this case you can add a dummy URL. 

Am I misunderstanding the API documentation?

Thank you,
Ted S