Unable to Retrieve refresh_token from Zoho Self-Client OAuth Flow

Unable to Retrieve refresh_token from Zoho Self-Client OAuth Flow

Hello Zoho Support Team,

I am currently integrating Zoho CRM with a custom Node.js backend using the Zoho OAuth 2.0 authorization process.

I created a Self-Client from the Zoho API Console and generated an authorization code successfully. However, when attempting to exchange this code for an access token and refresh token using the /oauth/v2/token endpoint, I am not receiving the refresh_token in the response