I also encountered an issue when trying to send email verifications. Specifically, you need a Gmail account that won't ends with @gmail.com. If you're using a different type of Gmail, such as a college or office email (e.g., [email protected]), it may support less secure apps in its settings.

For accounts like these, you may need to enable App Passwords in the Gmail settings. If you'd like, I can provide my Gmail for testing purposes. Feel free to message me on Instagram (https://www.instagram.com/_charitraa_/), and I’ll share my Gmail to help you test the email verification process.

Alternatively, you can enable App Passwords on my another account and try it yourself. i have two account of my college.

Verification.