curl --request POST \
  --url https://api.sumvin.com/v0/accounts/link \
  --header 'Content-Type: application/json' \
  --data '
{
  "institution_id": "<string>",
  "redirect_uri": "<string>",
  "products": [
    "<string>"
  ],
  "regions": [
    "<string>"
  ]
}
'

{
  "_links": {},
  "link": {
    "link_token": "<string>",
    "expiration": 123,
    "provider": "plaid"
  }
}