Create an opportunity user
curl --request POST \ --url https://us-central1-siro-prod.cloudfunctions.net/api-externalApi/v1/integrations/opportunity-users \ --header 'Content-Type: application/json' \ --data '{ "opportunityId": "<string>", "userId": "<string>", "name": "<string>", "amountPercentage": 123 }'
{ "id": "<string>", "opportunityId": "<string>", "userId": "<string>", "name": "<string>", "amountPercentage": 123, "organizationId": "<string>", "createdAt": "<string>", "updatedAt": "<string>", "integrationConnectionId": "<string>" }