Android Question Upload Multiple Images using PostMultipart

How can I upload multiple images using the same keyname for mulipartfile data? When I send multiple MFD in a list with the same keyname the api overwrites it and only takes the last file/image

B4X:
Dim MFD As MultipartFileData
MFD.Initialize
MFD.Dir = rp.GetSafeDirDefaultExternal("")
MFD.FileName = MyFile
MFD.KeyName = "userfile"
MFD.ContentType = "image/png"
 
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