request.post({
            form: { method: 'send',
                    username: 'max13',
                    password: '****',
                    from: '0000',
                    to:  admin1,
                    message: 'user '+ user_name +' has sent a job'
                                },
                    url: 'http://www.thsms.com/api/rest',

            form: {method: 'send',
                    username: 'max13',
                    password: '****',
                    from: '0000',
                    to:  admin2,
                    message: 'user '+ user_name +' has sent a job'},

                    url: 'http://www.thsms.com/api/rest',

.then(function(){
    return //your sms api code for admin1
  })
.then(function(){
    return //your sms api code for admin2
  })
.fail(function(){
     log error if any of above then block get failed
  })