List Credentials

curl --request GET \
  --url https://api.selcor.ai/v1/relay/credentials \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "label": "<string>",
      "platform": "<string>",
      "login_url": "<string>",
      "username": "<string>",
      "verified": true,
      "last_verified": "<string>",
      "created_at": "<string>"
    }
  ],
  "pagination": {
    "has_more": true,
    "next_cursor": "<string>"
  },
  "request_id": "<string>"
}