first draft of nintendo auth

src/Adapters/Auth/index.js

@@ -17,6 +17,7 @@ const qq = require("./qq");
 const wechat = require("./wechat");
 const weibo = require("./weibo");
 const steam = require("./steam");
+const nintendo = require("./nintendo");
 
 const anonymous = {
   validateAuthData: () => {
@@ -45,7 +46,8 @@ const providers = {
   qq,
   wechat,
   weibo,
-  steam
+  steam,
+  nintendo
 }
 function authDataValidator(adapter, appIds, options) {
   return function(authData) {