Create directory for each user

Hi,

I’m uploading files with a form and everything is working great.
The form is only for logged in users.
Is it possible for files to be uploaded to a directory under the main directory in drive, by the user’s username?

So if the main directory is uploads and username is john, files will go to uploads/john?

Or if not possible with api, just add the username to the file name:
john_image1.jpg ?

Thank You!

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