can i view devices I've authorized

You can Check your Apple ID device list to see where you're signed in

 (https://support.apple.com/en-us/HT205064) and remove any device that shouldn't be signed in using the steps in the link.

If there are none that shouldn’t be signed in, then all is good. But, if an unauthorized device is signed in, Change your Apple ID password https://support.apple.com/en-us/HT201355 

Here is What to do after you change your Apple ID or password https://support.apple.com/en-us/HT204071

Are you asking about devices/computers authorized for iTunes?

iTunes - View and remove your associated devices

Did you look at the link I posted?