Generate OAuth without Redirect URI

[ShubhranshuShekhar]

Hello Vijay,

First and foremost, sorry to post this issue here.
However, I have been trying to get a solution for this for past couple of days.

I need to generate oauth access token without redirect uri.
Reason being that i need to automate contact/ticket creation based on user's interaction with mobile application.

1. I tried this forum -- no help
   https://help.zoho.com/portal/community/topic/how-to-generate-oauth-access-token-with-the-help-of-api-only-no-redirections-and-two-steps

2. I contacted ZOHO Desk Support - little help
   I got below URL as response:
   https://zohodesk-extension.herokuapp.com/zoho-oauth/
   However when i tried to use it below is the result:
   
   

Can you please kindly help me out from this situation.

Regards,
Shekhar.