[Python] PiXhost's API- upload images

I'm trying to use PiXhost's api to upload images. Every time I request something from https://api.pixhost.to/images it always returns 400 Bad request. Their API documentation uses python unirest package, but I can't install it as it seems to use too old code.

Am I doing something wrong here?

Link to documentation

my code:

import requests
headers = {
"Content-Type": "multipart/form-data; charset=utf-8",
"Accept": "application/json"
}
params = {
"content_type": "0",
"max_th_size": "420"
}
files = {
"img": open("image.jpg", mode="rb")
}

response = requests.post("https://api.pixhost.to/images", headers=headers, params=params, files=files)```

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