matt-sandgren

# ------------------------------------------------------------------------------
# Helper function to create the file to POST to the source
# 
# I'm letting either a dataframe or a path to a file be passed. I thought it may
# be possible for a situation where tempfile() fails to arise. Maybe on a server
# on an account with no write permissions?
# 
# If a path is passed, return the uploaded file.
# 
# If a dataframe/tibble is passed, create a tempfile for the upload and return