Deregistering Amazon account HELP!

Hey! This has probably been asked before but I would like a solid answer… If I deregister the account on my amazon firestick, will kodi still be available once I register a different account?!

All I want to do is install Netflix, and catch up TV apps (bbc I player etc) but I can’t do so with the current account that is registered. Which I am assuming is the account that was set up by the person I purchased the firestick from?!

I have Googled this question but have found contradictive results so a reliable source would be appreciated before I continue.

Thanks, Lisa x

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