This is a low level function to retrieve an attachment to a message by id of the attachment
and message. Most users are better off using gm_save_attachments() to
automatically save all the attachments in a given message.
gm_attachment(id, message_id, user_id = "me")Other message:
gm_delete_message(),
gm_import_message(),
gm_insert_message(),
gm_messages(),
gm_message(),
gm_modify_message(),
gm_save_attachments(),
gm_save_attachment(),
gm_send_message(),
gm_trash_message(),
gm_untrash_message()
if (FALSE) { # \dontrun{
my_attachment <- gm_attachment("a32e324b", "12345")
# save attachment to a file
gm_save_attachment(my_attachment, "photo.jpg")
} # }