Adding a new email authorisation

Hi, Is it ppossible to add another email account to my adobde digitial editions? I have one email under my company email to read the books authorised under that account. And another to read the books under my personal email.

Is it possible to switch between 2 accoutns on the same device? How do I do it?

Also, is it possible to combine both email accounts into one?

Thank you!