Mismatched Redirect Uri

I'm trying to use the Ringcentral SDK with the Auth Code flow, I have setup my Oauth Redirect Uri in the app on the developer console under App -> my app name -> settings -> Oauth Redirect Uri

I was able to get an auth code setup using my app and the tutorial from https://github.com/ringcentral/ringcentral-api-docs/blob/master/docs/team-messaging/manual/node.md

But now that I am trying to add functionality that goes past what the ringcentral-chatbot package has by using the ringcentral SDK, I'm not able to use the auth code and redirect uri to login. here is some example code.

const SDK = require('ringcentral');

const rcsdk = new SDK({
    server: SDK.server.sandbox,
    appKey: myClientId,
    appSecret: myClientSecret,
    redirectUri: redirectUri
});

const platform = rcsdk.platform();

platform.login({
    code: myAuthCode,
    redirectUri: redirectUri
});

When I make the login request I get the following error "Redirect URIs do not match"

I have triple checked that the Redirect Uri in the Dev console -> App -> Settings -> Oauth Redirect Uri and my redirectUri variable in code are the same, and I have checked that the request being made through the SDK seems to have the correct body of

grant_type=authorization_code&code=<my_auth_code>&redirect_uri=<my_redirect_uri>

of course I have replaced the actual auth code with <my_auth_code> and redirect uri with <my_redirect_uri>

Is there any way I can figure out where the redirect uri mismatch is?