Business portal horrible to link multiple accounts and multiple users

On business.comcast.com

I can link a new account to our main account as the main Admin user.

However, we have 6 different users in accounting that I need to give access to, for each account, so they can manage the bills.

So after I add the account, I have to go separately edit 6 different users logins, manually edit their list of accounts, and add the new one.  We have 17 accounts currently.

If we hire another accounting person, I have to:

Create the user

Edit them

Add an account

Select from list

Click checkmark to save

Repeat 16 times

And if I'm adding more than one account, I have to repeat the process for each user. Can't add multiple accounts at once.

Would make a lot more sense when linking an account, to list the users and be able to select them to add to the account, all at once.

Like:

Linking account 738743946393772671.

Which users would you like to have access?

Bob

Carol

Ted

Alice

Or even being able to add these existing users from the "Account Details" for that account.

Currently only offers "Add New User", which only lets you create a new user, not add existing ones.

You know, like typical websites started doing in about 2002.