diff --git a/app/helpers/swagger_ui_engine/config_parser.rb b/app/helpers/swagger_ui_engine/config_parser.rb
index 8a379bf..512f783 100644
--- a/app/helpers/swagger_ui_engine/config_parser.rb
+++ b/app/helpers/swagger_ui_engine/config_parser.rb
@@ -1,10 +1,9 @@
 module SwaggerUiEngine
   module ConfigParser
     SwaggerUiEngine::DEFAULTS.each do |default|
-      config_name = default.first.to_s
-      next if config_name == 'validator_url'
-
-      define_method("set_#{config_name}") do
+      next if default.first.to_s == 'validator_url'
+      
+      define_method("set_#{default.first}") do
         # set_swagger_url set_doc_expansion
         # set_json_editor set_model_rendering
         # set_request_headers
diff --git a/app/helpers/swagger_ui_engine/oauth_config_parser.rb b/app/helpers/swagger_ui_engine/oauth_config_parser.rb
index 7a21c34..4960044 100644
--- a/app/helpers/swagger_ui_engine/oauth_config_parser.rb
+++ b/app/helpers/swagger_ui_engine/oauth_config_parser.rb
@@ -1,31 +1,12 @@
 module SwaggerUiEngine
   module OauthConfigParser
-    def set_oauth_app_name
-      configuration.oauth_app_name || 'your-app-name'
-    end
-
-    def set_oauth_client_id
-      configuration.oauth_client_id || 'your-client-id'
-    end
-
-    def set_oauth_client_secret
-      configuration.oauth_client_secret || 'your-client-secret-if-required'
-    end
-
-    def set_oauth_realm
-      configuration.oauth_realm || 'your-realms'
-    end
-
-    def set_oauth_scope_separator
-      configuration.oauth_scope_separator || ' '
-    end
-
-    def set_oauth_query_string_params
-      configuration.oauth_query_string_params || {}
-    end
-
-    def configuration
-      SwaggerUiEngine.configuration
+    SwaggerUiEngine::OAUTH2_DEFAULTS.each do |default|
+      define_method("set_#{default.first}") do
+        # set_oauth_app_name set_oauth_client_id
+        # set_oauth_client_secret set_oauth_realm
+        # set_oauth_scope_separator set_oauth_query_string_params
+        configuration.send("#{default.first}") || default.last
+      end
     end
   end
 end
diff --git a/lib/swagger_ui_engine/defaults.rb b/lib/swagger_ui_engine/defaults.rb
index 1cf0bcc..0c4d193 100644
--- a/lib/swagger_ui_engine/defaults.rb
+++ b/lib/swagger_ui_engine/defaults.rb
@@ -7,4 +7,13 @@ module SwaggerUiEngine
     request_headers:  false,
     validator_url:    '//online.swagger.io/validator'
   }.freeze
+
+  OAUTH2_DEFAULTS = {
+    oauth_app_name: 'your-app-name',
+    oauth_client_id: 'your-client-id',
+    oauth_client_secret: 'your-client-secret-if-required',
+    oauth_realm: 'your-realms',
+    oauth_scope_separator: ' ',
+    oauth_query_string_params: {}
+  }.freeze
 end