For some reason, once added SSL to a server it becomes much harder to upload a folder, in the form of zip file. This scripts allows to connect easily with S3 in AWS, and get the folder from there.
library(aws.s3)
Sys.setenv("AWS_ACCESS_KEY_ID" = "XXX",
"AWS_SECRET_ACCESS_KEY" = "xxxx",
"AWS_DEFAULT_REGION" = "eu-central-1")
save_object("demand_hackaton_pro.zip",
file = "demand_hackaton_pro.zip",
bucket = "enerflows")
unzip("demand_hackaton_pro.zip")