curl --request POST \
  --url https://app.mlm-platform.com/api/v1/auth/link \
  --header 'Content-Type: application/json' \
  --header 'x-tenant-api-key: <api-key>' \
  --data '
{
  "mlmUserId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "externalId": "<string>",
  "provider": "<string>"
}
'

{
  "error": "Validation failed",
  "code": "VALIDATION_ERROR",
  "details": {
    "email": "Invalid email format"
  }
}