text: 
  var User                    =   require('../../../model/User-model');
  var helper                  =   exports = module.exports = {};
  
  helper.validateCreateRequest     =   function(payload, callback){
      if(!payload.msisdn){
          return callback('user.create.msisdn.required');
      }
      if(!payload.firstName){
          return callback('user.create.firstname.required');
      }
      if(!payload.lastName){
          return callback('user.create.lastname.required');
      }
      User.findOne({msisdn: payload.msisdn}, function(err, user){
          if(user){
              return callback('user.create.msisdn.exist');
          }else{
              return callback();
          }
      });
  };
  helper.createUser  =   function(data, admin, callback){
      var user                =   new User(data);
      user.persist(admin, function(err, doc){
          return callback(err, doc);
      });
  };
  module.exports  =   helper;
  