More/Accounts
The Account Manager is where you add/edit/delete accounts.
Switch Account
To change the current account, tap on its name.
New
Edit/Delete
Long press on an account name to enter edit mode. Then you will have the option to rename or delete it.
đź’ˇ
The current account cannot be deleted unless it is the only account remaining. You need to switch to another account.
At the moment, there is no way to reorder accounts.