Handling multiple sender companies - multiple accounts or one?

Dear b2brouter,

I'd like to send invoices on behalf of multiple different sender companies / invoice creators.

How would the configuration look like in this case? Do we need an account for each sender? Or can we handle all of them inside one account? What would be the configuration process for each of these so that in the end I'm able to work with a single API token and handling multiple senders?

Thank you in advance!
Best Regards,
Tamás