fix(server): fix oauth PR

Author: Awk34

templates/app/server/api/user(auth)/user.model(mongooseModels).js

@@ -95,9 +95,10 @@ UserSchema
   .path('email')
   .validate(function(value, respond) {
     var self = this;
+    <%_ if(filters.oauth) { _%>
     if (authTypes.indexOf(this.provider) !== -1) {
       return respond(true);
-    }
+    }<% } %>
     return this.constructor.findOne({ email: value }).exec()
       .then(function(user) {
         if (user) {