curl --request POST \
  --url https://api.sandbox.finsei.com/v3/auth/token \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data fingerprint=

{
  "access": {
    "token": "<string>",
    "expiredAt": 123,
    "expiresIn": 123
  },
  "refresh": {
    "token": "<string>",
    "expiredAt": 123,
    "expiresIn": 123
  }
}