Hello!
Now method Accounts Dashboard | HubSpot
is returning only Portal ID, time zone setting, and selected currency of customer’s account.
It’s pretty sad that you don’t have an API method for getting the account name, since theoretically a single client can have multiple accounts and it would be nice to give them the option to select the desired one or at least display the name of the current one. I hope that in the future you will expand the functionality of the /integrations/v1/me method (you can simply add the AccountName field to the response) or make a similar method that returns AccountName as a part of the implementation of the API v3.
Best regards.