Access public sharepoint links using Microsoft365R

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Hi, I want to programmatically download a set of files which sit inside an organisation's sharepoint folder which was made publicly available. I wanted to connect to this folder using get_sharepoint_site() but the function takes me to a login page, moreover I get a "need admin approval" message. Is there any way to bypass authentication and just connect to this publicly available sharepoint url using Microsoft365R? Many thanks.