Get an opportunity

curl --request GET \
  --url https://us-central1-siro-prod.cloudfunctions.net/api-externalApi/v1/integrations/opportunities/{id}

{
  "id": "<string>",
  "externalId": "<string>",
  "name": "<string>",
  "amount": 123,
  "closedAt": "<string>",
  "disposition": "<string>",
  "createdAt": "<string>",
  "updatedAt": "<string>",
  "recordingId": "<string>",
  "accountId": "<string>",
  "organizationId": "<string>",
  "account": "<any>",
  "opportunityUsers": [
    "<any>"
  ]
}