curl --request POST \
  --url https://my.server.express/api/v1/unsubscribe \
  --header 'Content-Type: application/json' \
  --data '
{
  "u": "<string>",
  "t": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({u: '<string>', t: '<string>'})
};

fetch('https://my.server.express/api/v1/unsubscribe', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://my.server.express/api/v1/unsubscribe"

payload = {
    "u": "<string>",
    "t": "<string>"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "success": true,
  "data": {
    "unsubscribed": true
  }
}

{
  "success": false,
  "error": "<string>"
}

{
  "success": false,
  "error": "<string>"
}