I'm converting a Winforms app written in 2016 to core using RingCentral.Net 6.1.0. I've studied GitHub code and only need Oauth like we've been doing since 2016. I can instantiate and add an extension successfully to the RestClient but when I make an API call I get a null object reference. Debugging the RestClient object the token is null. The exception message isn't clear what is null, except I can see the Token property of the RestClient is null. See below.
RingCentral 6.1.0 null object reference when making API call.
The attached image is broken. Could you please post sample code to reproduce the issue?
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