adding an additional contact to my listing

[Sybilla0]

I'm trying to add another contact (email and phone #) to my listing so that myself and the additional person will have constant access and updates from the listing.  How can I do this? 

[Kate65]

I'm looking to do the same thing, but haven't found any accurate resources on AirBNB's help pages.  Hopefully someone out there knows how to do this...