Creating different users to access the same account is not possible at the moment. You can only have one username to your Zervant account.
You can share your username with your employees to give them access to the account, but we do not recommend using it on multiple devices at the same time. Zervant is a cloud based software, and there will likely be problems with data integrity if one account is used simultaneously in different tabs/browsers/computers.
Creating different Zervant accounts to manage invoicing for one company is not recommended either, because the software allows Company IDs and VAT numbers to be used only once. Multiple accounts also would not sync with each other's automatically.
Having different user roles to one account is a highly requested feature, and we hope to implement it in the future.