PubNub subscription failure

[Brutalbeard]

Added a puts req to the SDKs subscription.rb file so I can see the full request. Pasted below. Note, I'm using password authentication flow (having issues in office using the 8080 redirect for your go oauth2 example).

#<struct Faraday::Request method=:post, path="subscription", params={}, headers={"User-Agent"=>"ringcentral-sdk-ruby/2.2.1 ruby/2.4.1 x86_64-darwin16", "RC-User-Agent"=>"ringcentral-sdk-ruby/2.2.1 ruby/2.4.1 x86_64-darwin16", "SDK-User-Agent"=>"ringcentral-sdk-ruby/2.2.1 ruby/2.4.1 x86_64-darwin16", "Content-Type"=>"application/json"}, body={:eventType=>["/restapi/v1.0/account/~/extension/~/glip/posts"], :deliveryMode=>{:transportType=>"PubNub"}}, options=#<Faraday::RequestOptions (empty)>>
[2018-01-15 16:07:52 UTC] INFO: post https://platform.devtest.ringcentral.com/restapi/v1.0/subscription
[2018-01-15 16:07:52 UTC] INFO: 400
/usr/local/lib/ruby/gems/2.4.0/gems/ringcentral_sdk-2.2.1/lib/ringcentral_sdk/rest/subscription.rb:90:in `rescue in subscribe': Subscribe HTTP Request Error: undefined method `-' for nil:NilClass (RuntimeError)
        from /usr/local/lib/ruby/gems/2.4.0/gems/ringcentral_sdk-2.2.1/lib/ringcentral_sdk/rest/subscription.rb:71:in `subscribe'
        from /usr/local/lib/ruby/gems/2.4.0/gems/glip_sdk-0.0.5/lib/glip_sdk/rest/posts.rb:59:in `observe'
        from /usr/local/lib/ruby/gems/2.4.0/gems/lita-glip-0.2.0/lib/lita/adapters/glip/connector.rb:48:in `client_connect'
        from /usr/local/lib/ruby/gems/2.4.0/gems/lita-glip-0.2.0/lib/lita/adapters/glip/connector.rb:32:in `connect'
        from /usr/local/lib/ruby/gems/2.4.0/gems/lita-glip-0.2.0/lib/lita/adapters/glip.rb:45:in `run'
        from /usr/local/lib/ruby/gems/2.4.0/gems/lita-4.7.1/lib/lita/robot.rb:80:in `run'
        from /usr/local/lib/ruby/gems/2.4.0/gems/lita-4.7.1/lib/lita.rb:80:in `run'
        from /usr/local/lib/ruby/gems/2.4.0/gems/lita-4.7.1/lib/lita/cli.rb:77:in `start'
        from /usr/local/lib/ruby/gems/2.4.0/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
        from /usr/local/lib/ruby/gems/2.4.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
        from /usr/local/lib/ruby/gems/2.4.0/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch'
        from /usr/local/lib/ruby/gems/2.4.0/gems/thor-0.20.0/lib/thor/base.rb:466:in `start'
        from /usr/local/lib/ruby/gems/2.4.0/gems/lita-4.7.1/bin/lita:6:in `<top (required)>'
        from /usr/local/bin/lita:22:in `load'
        from /usr/local/bin/lita:22:in `<main>'