key is provided and a file with that key already exists for this player, the file will be updated (appending a new revision). If no file with that key exists, a new file will be created. If no key is provided, a new file is always created (backward compatible).curl --location 'https://api.lootlocker.io/server/players/12345/files' \
--header 'x-auth-token: {{server_api_key}}' \
--form 'file=@""' \
--form 'purpose="save_game"' \
--form 'public="true"' \
--form 'key="my_save_slot_1"'{
"id": 0,
"revision_id": "string",
"name": "string",
"key": "string",
"size": 0,
"purpose": "string",
"url": "string",
"url_expires_at": "2019-08-24T14:15:22.123Z",
"created_at": "2019-08-24T14:15:22.123Z"
}