diff --git a/app/api/mobile/apis/users.rb b/app/api/mobile/apis/users.rb
index 8b7edd155..33ea075a7 100644
--- a/app/api/mobile/apis/users.rb
+++ b/app/api/mobile/apis/users.rb
@@ -5,6 +5,7 @@ module Mobile
       get do
         ['hello']
       end
+
       desc "add a user"
       params do
         requires :login, type: String, desc: 'username'
@@ -12,16 +13,13 @@ module Mobile
         requires :password, type: String, desc: 'password'
       end
       post do
-        user = User.new
-        user.login = params[:login]
-        user.mail = params[:mail]
-        user.password = params[:password]
-        user.password_confirmation = params[:password]
-        user.activate
-        if user.save!
-          UserStatus.create(:user_id => user.id, :changsets_course => 0, :watchers_count => 0)
+        user_service = UsersService.new
+        begin
+          user = user_service.register(params)
+          {status: 0, data: user}
+        rescue Exception => e
+          {status: 1, message: e.message}
         end
-        user
       end
     end
   end