Get Company by User ID
Returns information for the Company account that corresponds to the provided user ID.
Equivalent Storefront GraphQL API Query: `userCompany`. For more information, see the [GraphQL Playground](https://api-b2b.bigcommerce.com/graphql/playground).
You must use the `userId` value for the Company user to return the correct Company; the `customerId` value of the corresponding BigCommerce customer account is not supported.