Do you need a drivers license for street legal electric scooters?

Well, first that depends on your area, here in Phoenix, any motorized vehicle operated on city streets or sidewalks except for mobility scooters must be registered (city ordinance), so yes.

Elsewhere, prolly not, usually the number of cc's is how they determine it, and since it has a 0cc engine you wouldn't. Now that said, they'd prolly have a few words for you as you'd be able to go to fast number one, two, they're likely to find another way to measure it down the road, thereby requiring it.

Play it safe and just get the license now.

u dont even need to register ur electric bike, leave alone get a license to ride one, in India. the authorities here treat it under same regs as an bicycle.