Snapchat today rolled out the security fix it promised last week, which lets users opt out of the app's "Find Friends" feature. The feature, which let users plug in their phone number to find friends using the app, was the root of the leaking of 4.6 million phone numbers and usernames on New Year's Day. In a blog post, the company apologized for the first time, and re-emphasized that the leak resulted from the abuse of its API, and not from its servers being hacked. To access the new feature that lets you opt out of Find Friends, head over to the app's Setting page and tap "Mobile #."