fix cnmooc create user api

app/services/cnmoocs_service.rb

@@ -75,6 +75,7 @@ class CnmoocsService
     if c_user.present?
       return { error: -1, messages: '用户已存在' }
     end
+    c_user = CnmoocUser.new(uuid: params[:userName], name: params[:name])
 
     mail = params[:email] || c_user.generate_email
     create_params = {