Uploading files to SharePoint from R - r

Question

I am trying to upload a file from R to SharePoint. I have found similar questions like Saving files to SharePoint folder from R, Saving a file to Sharepoint with R and Copying file to sharepoint library in R but I haven't been able to get it working for myself.
The things I tried so far:
system("curl --ntlm --user username:password --upload-file file.xslx https://companyname.sharepoint.com/sites/sitename/Shared%20documents/file.xlsx")
system("curl --ntlm --user username:password --upload-file file.xslx https://companyname.sharepoint.com/sites/sitename/Documents/file.xlsx")
system("curl --ntlm --user username:password --upload-file file.xslx https://companyname.sharepoint.com/sites/sitename/Shared documents/file.xlsx")
system("curl --ntlm --user username:password --upload-file file.xslx \\\\companyname.sharepoint.com#SSL\\sites\\sitename\\Shared%20documents\\file.xlsx")
Note that our SharePoint is in our native language (Dutch), so the folder "Shared documents" is "Gedeelde documenten". I tried both languages but without success. Not sure if I am supposed to the English names or the Dutch ones.
My guess is that the url I use is not in the correct format or such, so I have played around with that but can't come up with the correct way myself.
Any help is much appreciated.
EDIT:
This is how the page and folder in Sharepoint looks like.
Full url (guessed the part from /Forms till the end is not needed in the command): https://companyname.sharepoint.com/sites/SiteName/Gedeelde%20documenten/Forms/AllItems.aspx?id=%2Fsites%2FOfficeSFMT%2FGedeelde%20documenten%2FGeneral%2FTest
Screenshot of the folder:
My best guess was trying: "--upload-file C:/Users/UserName/Documents/Test.txt", "companyname.sharepoint.com/sites/SiteName/Documenten/General/Test/Test.txt"

Answer 1

I just tested the following code and it worked:
cmd <- paste("curl --max-time 7200 --connect-timeout 7200 --ntlm --user", "username:password", "--upload-file Book1.xlsx","teamsites.companyname.com/sites/SandBox/Documents/UserDocumentation/Test/Book1.xlsx", sep = " ")
system(cmd)
I routinely use the following function.However, the only issue will be the file that was transferred will remain 'checked-out' until the File is manually 'checked-in' for others to use.
saveToSharePoint <- function(fileName)
{
cmd <- paste("curl --max-time 7200 --connect-timeout 7200 --ntlm --user","username:password",
"--upload-file", paste0("/home/username/FolderNameWhereTheFileToTransferExists/",fileName),
paste0("teamsites.OrganizationName.com/sites/PageTitle/Documents/UserDocumentation/FolderNameWhereTheFileNeedsToBeCopied/",fileName), sep = " ")
system(cmd)
}
saveToSharePoint("SomeFileName.Ext")