curl --request POST \
  --url https://sandbox.deck.co/api/v1/link/connect \
  --header 'Content-Type: application/json' \
  --data '{
  "link_token": "<string>",
  "source_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "fields": [
    {
      "field_name": "<string>",
      "field_value": "<string>"
    }
  ],
  "terms_of_use_url": "<string>",
  "privacy_policy_url": "<string>"
}'

{
  "public_token": "<string>"
}