[C2C] Who is 'Third party' from Grant callback access?

[nayelyz (SmartThings Developer Support)]

1. If you are developing an OAuth server to control the authentication, that server (your cloud) is the Third-party (a cloud external to SmartThings).
2. When the user login into your OAuth server, you need to return an access token code.
   Check this sample where an OAuth server is included for testing purposes and you will be able to check how the access token is generated randomly (You can set your own mechanism).

Schema Devices and Custom Capabilities

Creating custom capabilties for schema devices Using the SmartThings CLI and Developer Workspace We are going to create a Cloud Connected Device using Schema and webhooks. Our base device will be a basic switch. The first part of this tutorial will cover create the connector, oAuth server, and adding the Switch to SmartThings. The second part of the tutorial will cover adding a custom capability to this new device. Prerequisites: Samsung Account Developer Workspace Access Developer Mode Enabled Glitch Account Text File Step 1: Remix this Glitch account (connector) Set the values in the .env file using .env-example as a guide. Once the remixed app is up and running copy its URL to your text file. Register the webhook url in SmartThings Developer Workspace and deploy it for t…

3. The grantCallbackAccess is not needed unless you want to send updates from your cloud to SmartThings, for example, when the device status is changed manually and not from the ST mobile app.
Check more details about its configuration in the Node JS Schema Connector SDK repository and let me know if you have any doubts.