curl --request POST \
  --url https://api.lightspark.com/grid/2025-10-13/customers/external-accounts/{externalAccountId}/untrust \
  --header 'Authorization: Basic <encoded-value>'

const options = {method: 'POST', headers: {Authorization: 'Basic <encoded-value>'}};

fetch('https://api.lightspark.com/grid/2025-10-13/customers/external-accounts/{externalAccountId}/untrust', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

val client = OkHttpClient()

val request = Request.Builder()
  .url("https://api.lightspark.com/grid/2025-10-13/customers/external-accounts/{externalAccountId}/untrust")
  .post(null)
  .addHeader("Authorization", "Basic <encoded-value>")
  .build()

val response = client.newCall(request).execute()

{
  "scaChallenge": {
    "id": "ScaChallenge:019542f5-b3e7-1d02-0000-000000000007",
    "expiresAt": "2025-10-03T12:05:00Z",
    "availableFactors": [
      "SMS_OTP"
    ],
    "purpose": "PAYOUT",
    "passkeyAssertionOptions": {},
    "passkeyAllowedOrigins": [
      "https://app.example.com"
    ]
  }
}

{
  "status": 400,
  "message": "<string>",
  "details": {}
}

{
  "status": 401,
  "message": "<string>",
  "details": {}
}

{
  "status": 404,
  "message": "<string>",
  "details": {}
}

{
  "status": 409,
  "message": "<string>",
  "details": {}
}

{
  "status": 500,
  "message": "<string>",
  "details": {}
}