Authentication failed using Python

Hello,

I'm trying to get response form spiratest using python.

Here is the code I wrote.

import json, requests
body = {"highlightedLinkId": -8}
headers = {
    'accept': 'application/json',
    'Content-Type': 'application/json',
    'User-Agent': "John Smith",
}

params = {
    'username': 'SmithJ',
    'api-key': '{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXXX}',
}
url = "https://company.name.co.uk/SpiraTest/Services/Ajax/GlobalService.svc/GlobalNavigation_RetrieveWorkspaces"
response = requests.post(url, data=json.dumps(body), params=params, headers=headers)
print(response.text)

I've copied RSS / API Key from the settings.

However I have the following error:

'{"Message":"Authentication failed.","StackTrace":"","ExceptionType":""}'

Could you tell me please what I'm doing wrong, please.

Thank you in advance for any response.