It looks like one of the biggest data leaks of 2019 has already been discovered by researcher Troy Hunt. The data leak, as mentioned on his website ‘troyhunt.com’, includes a massive database of 773 million email IDs and 21 million passwords. These come as a part of ‘Collection #1’ by Hunt.
For more info : https://timesofindia.indiatimes.com/gadgets-news/over-700-million-email-ids-hacked-heres-how-you-can-check-if-yours-is-in-the-list/articleshow/67570561.cms
Source: The Times of India