This is required The path to the new folder to create relative to
root.
local_file
The name of the local copy. Leave this blank if you're fine with the original name.
rev
The revision of the file to retrieve. This defaults to the most recent revision.
overwrite
Default is FALSE but can be set to TRUE.
verbose
By default verbose output is FALSE. Set to TRUE
if you need to troubleshoot any output or grab additional parameters.
dtoken
The Dropbox token generated by drop_auth.
rdrop2 will try to automatically locate your local credential cache and use
them. However, if the credentials are not found, the function will initiate
a new auth