Maybe real dollar values will help this discussion:

https://www.bankrate.com/finance/credit/what-your-identity-i...

And gmail credentials:

https://www.popsci.com/technology/article/2013-07/how-much-y...

Hilarious that the two replies to you are exact opposite answers, and neither is the original commentator

Email password, of course. I give out my ssn for identification to various organizations. I NEVER give out my email password to anyone except my email provider

Is that even a question? guess what is needed when you go apply for mortgage?