Internal Server Error during OAuth Access Token Request

Apps & Clients
1

I am implementing the SmartThings OAuth flow, but I encountered an issue during the Access Token exchange step. Here are the steps I followed:

  1. Displayed the authorization page to the user
    I used the following URL to display the authorization page:

bash

https://api.smartthings.com/oauth/authorize?client_id=${clientId_from_app}&response_type=code&redirect_uri=${redirect_uri_from_app}&scope=${scopes_from_whitelisted_inApp}
  1. Received the Authorization Code
    After the user authorized access, the redirect URI successfully received the Authorization Code.
  2. Error during Access Token exchange
    When attempting to exchange the Authorization Code for an Access Token, I received an Internal Server Error response. Here’s the request I made:

bash

curl -X POST "https://api.smartthings.com/oauth/token" \  
-u "${clientId_from_app}:${clientSecret_from_app}" \  
-H "Content-Type: application/x-www-form-urlencoded" \  
-d "grant_type=authorization_code&client_id=${clientId_from_app}&code=${codeReceived}&redirect_uri=${redirect_uri_from_app}"

4.Response*:

json

{  
    "error": "server_error",  
    "error_description": "Internal Server Error"  
}