Hi Arjun, Could you let me know what type of OAuth2 credentials you are using? Could you also confirm that you followed the instructions provided here <https://github.com/googleads/google-api-ads-ruby/tree/master/adwords_api/examples/adwords_on_rails> to set up the Rails application? Since this is specific to the Ruby client library, I suggest that you create an issue in the library's repository <https://github.com/googleads/google-api-ads-ruby/issues> as well.
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