This function provides a consistent means across OS-types to access the
.ssh directory.
ssh_path(file = "")Full path to the file
On Windows-based systems,
path.expand("~") returns "C:/Users/username/Documents",
whereas the usual path to the .ssh directory is
"C:/Users/username".
On other operating systems, path.expand("~") returns the usual path
to the .ssh directory.
Calling ssh_path() with no arguments will return the usual path to
the .ssh directory.
ssh_path()
#> [1] "/cluster-data/user-homes/andrew/.ssh/"
ssh_path("is_rsa.pub")
#> [1] "/cluster-data/user-homes/andrew/.ssh/is_rsa.pub"