Experiment with V2 static helpers

This feature is also under experiment in the Go client. For now, as the
Go client, I'll only add support for the Whoami method.

More methods will be added in the future if the design of this client
feature makes sense.

lib/dnsimple.rb

@@ -1,5 +1,3 @@
-require 'httparty'
-
 module Dnsimple
 
   # Echoes a deprecation warning message.

lib/dnsimple/client.rb

@@ -1,3 +1,4 @@
+require 'httparty'
 require 'dnsimple/extra'
 require 'dnsimple/struct'
 require 'dnsimple/response'

lib/dnsimple/client/clients.rb

@@ -136,4 +136,13 @@ class WebhooksService < ClientService
     end
 
   end
+
+  # This module exposes static helpers for the API v2.
+  #
+  # Compared to the full, extended API methods provided by the various client services,
+  # these static methods return directly the underlying data objects.
+  # Therefore, it's not possible to access response metadata such as throttling or pagination info.
+  module V2
+    extend Client::Identity::StaticHelpers
+  end
 end

lib/dnsimple/client/identity.rb

@@ -4,7 +4,7 @@ module Identity
 
       # Gets the information about the current authenticated context.
       #
-      # @see https://developer.dnsimple.com/v2/identity/
+      # @see https://developer.dnsimple.com/v2/identity/#whoami
       #
       # @param  [Hash] options
       # @return [Dnsimple::Response<Hash>]
@@ -18,6 +18,21 @@ def whoami(options = {})
         Response.new(response, { account: account, user: user })
       end
 
+
+      module StaticHelpers
+        # Calls {Identity#whoami} and directly returns the response data.
+        #
+        # @see https://developer.dnsimple.com/v2/identity/#whoami
+        #
+        # @param  [Dnsimple::Client] client the DNSimple client instance to use
+        # @param  [Array] args the args for the {Identity#whoami} call
+        # @return [Hash]
+        # @raise  [Dnsimple::RequestError]
+        def whoami(client, *args)
+          client.identity.whoami(*args).data
+        end
+      end
+
     end
   end
 end