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Hi, I've got a sandbox app running. In my auth flow, I've received my auth code and am trying to exchange it for a token.

I have verified that my app is set up to accept authorization code auth flow.

But, when I make my request, I get an

"Account does not exist", "errors" : [ { "errorCode" : "OAU-222", "message" : "Account does not exist" } ] }"

However, I'm using the same client_id as I provided for the auth code, the one listed under sandbox in my app settings. This account should exist?

The url I'm sending the request to: https://platform.devtest.ringcentral.com/restapi/oauth/token

What am I doing wrong? Thanks for your help.