How to add/link a 2nd existing Xfinity email address to my Xfinity App?

I only have ONE Xfinity account with 3 exsisting email addresses defined. Don't want to Link accounts as I only have ONE.  What I'd like to do is go into my one account via my Xfinity App, click EMAIL and have the selection of the 3 existing email addresses to choose from. Mine as Primary and my 2 secondary email addresses, is that possible?

Thanks Again!!  

... What I'd like to do is go into my one account via my Xfinity App, click EMAIL and have the selection of the 3 existing email addresses to choose from ...

I don't think you can do that with the Xfinity app. Selecting its Email option merely launches a web browser to connect.xfinity.com for the ID you logged in to the app with. To do what you want to do you'd have to set up the additional email IDs in a 3rd party email app (Gmail/Thunderbird/Outlook etc). See https://www.xfinity.com/support/articles/email-client-programs-with-xfinity-email for (poorly written) instructions.

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Thank you Bruce for understanding the question.  Yes, I had 3rd party email apps that can do exactly that through their one account, maybe because the Xfinity email accounts are external to them, my guess.  I was hoping I could do something like that through Xfinity's App, oh well. 

Thanks Again!!