You can be granted access to multiple companies.
For example;
You may work for yourself, but also work as a subcontractor for several different companies.
If your user is linked to multiple companies, you can easily switch between them, depending on the work you're currently doing.
It's possible to switch company accounts using the Dashboard, or the Mobile App.
Ask an administrator to invite you to their company.
If you have a Flow account setup already, ask them to invite you with the same email so you can use the company account switching features described in this article.