Opening Sharepoint file having access rights

[Sukumar.Balusamy]

Hello,

I am trying to access files which are loaded in our company Sharepoint location. Using any internet browsers (IE, Chrome) I can open the files. But I am clueless about how to access the same using R.

FileOne <- GET(
"https://ourDomain.sharepoint.com/sites/xxxx/File_Name1.xlsx",
authenticate("ourDomain\myusername", "mypassword")
)

When I Run the above I am getting the following

Response [https://ourDomain.sharepoint.com/sites/xxxx/File_Name1.xlsx]
Date: 2020-02-17 10:16
Status: 403
Content-Type: text/plain; charset=utf-8
Size: 13 B

Could you please help me how to resolve 403 Status error.

Thanks in advance.
Regards,
Sukumar