Mount Shared Drive via AFP in Terminal
A couple of things you need to be aware of.

First - the AFP URL needs to contain the name of the share - not it's location on the server. Second, the mount point must be an empty directory that you have write permission to. So your commands might be :-

sudo mkdir /Volumes/mount
sudo mount -t afp afp://user:pass@ipaddress/SharedDrive /Volumes/mount