Thanks for reaching out. This is a spam mail, YouTube will never ask for PII like channel password, etc. You can report this phishing mail here: https://yt.be/help/njrq . Also, check this article for the tips to verify mail authenticity: https://yt.be/help/XrFV . Hope this helps.
Update! Thanks for your patience while we look looked into this for you. Monetization has been reinstated on your channel. Let us know if you need any further help.
