Import a file from a specified Sharepoint location

Usage

import_sharepoint(file, site, drive, destination = NULL)

file: Name and location of the file you want to extract from sharepoint. Includes the extension and any folders after the drive name
site: Name of sharepoint site you want to take a file from. Can be found in the URL of the Sharepoint location, e.g. for "departmentfortransportuk.sharepoint.com/sites/Rail", the site name would be Rail
drive: Name of the sharepoint drive the file sits on. Can be found in the URL of the sharepoint location e.g. for "departmentfortransportuk.sharepoint.com/sites/Rail/RailStats", the drive name is "RailStats". Can also be found using the list_sharepoint_drives() function in this package.
destination: Folder and filename location to download the file to. Defaults to NULL, which saves the file with it's current filename in your current working directory.