how can I correct the Bad Request error on my curl request

[snippsat]

import requests

headers = {
    "Content-Type": "application/json",
}
data = '{\n"from": "35315313424",\n"to": "447860041755",\n"text":\
     "Apifonica API provides a really cool SMS messaging service"\n}'

response = requests.post(
    "https://api.apifonica.com/v2/accounts/aa9999/messages",
    headers=headers,
    data=data,
    auth=("aa9999", "111111"),
)

print(response.content)

Output:
b'{"status_code":401,"error_code":10010,"error_text":"Unauthorized","uri":"https://www.apifonica.com/en/docs/api/rest/errors#10010"}'

If run this code do you get error 10012?
I do get 10010 Unauthorized as except as i have not have signed up and gotten accountSID and token.