Done SSH Public Key Authentication for FTPDrops and FTPDirs

We would like to use public key authentcation instead or in addition to passwords when FTPDrops and FTPDirs are accessed via sftp or scp protocols. We would like to be able to add multiple public keys to each FTPDrop/FTPDir.

I currently maintain an SFTP Chroot server separate from our Liquid Files system. The ability to do this would allow me to fully replace that system with Liquid Files as well.