Adding someone to current reservations

[MarineFam]

I have my nephew and his girlfriend joining us at AKV in April and I am trying to add them to our reservation online but couldn't see where to do it. I can do my online check-in now so I want to add them and lock on their Magical express so I can finish everything and complete the online check-in. thanks for any help

 

[Sandisw]

You have to call MS or send an email contact through the website.