{
  "_comment": "INPUT - POST /v1/connections. One login to one portal. provider is a name from GET /v1/providers; credentials always carry username and password. Answered 201 with the connection (01b), or 200 with the existing one when this login is already registered, after storing the password sent.",
  "provider": "Example Electric Cooperative",
  "credentials": {
    "username": "billing@yourco.example",
    "password": "example-password"
  },
  "client_reference": "site-114"
}