The second one, Sneha! Because I don't know my passwords and every time I need one I have to log into the password manager, instead with social login it's a snap!
It's a toss-up. Third-party services are super convenient, but I'm always wary about what data I'm sharing. Email and password seems safer, if less smooth.
I prefer Google sign in, but offering multiple sign-in methods can improve conversion rates, as users may be more likely to sign up if they can use a method they are already familiar with. As a user, I always use third parties, as a builder, if I can bring both to my product I would.
I mostly register using my email and password, but after that I get a lot of emails with various offers, which sometimes annoys me. Even if I just register through Google, they will come anyway. Therefore, if there is an opportunity, I register only using a phone number, because there is not such a lot of spam, besides, my friend said that you can use a disposable phone number and my personal number will be safe and thanks to this advertising won't bother me.