Merge pull request #175 from omu/yoksis_v4

Add a sample endpoint for API restriction checks

app/services/yoksis/v4/universiteleri_birimler.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module Services
+  module Yoksis
+    module V4
+      # client = Services::Yoksis::V4::UniversiteBirimler.new
+      class UniversiteBirimler
+        def initialize
+          wsdl = 'http://servisler.yok.gov.tr/ws/UniversiteBirimlerv4?WSDL'
+
+          @client = Savon.client(
+            wsdl: wsdl,
+            convert_request_keys_to: :camelcase,
+            basic_auth: [Rails.application.credentials.yoksis[:user], Rails.application.credentials.yoksis[:password]]
+          )
+        end
+
+        # alias: list_countries
+        def universiteleri_getirv4
+          @client.call(__method__).body
+        end
+
+        alias universities universiteleri_getirv4
+      end
+    end
+  end
+end