curl --request POST \
  --url https://api.dots.dev/api/v2/payment-methods/{payment_method_id}/attach \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "customer_id": "<string>"
}
'

{
  "platform": "ach",
  "id": "<string>",
  "description": "<string>",
  "mask": "<string>",
  "email": "<string>",
  "phone_number": "<string>",
  "cash_tag": "<string>",
  "country": "<string>",
  "currency": "<string>",
  "rtp_enabled": true,
  "meta": "<unknown>"
}