ACLU called the original summons by the federal government “unconstitutional” and said that their backing down was a “big victory for free speech and right to dissent.”

“The speed with which the government buckled shows just how blatantly unconstitutional its demand was in the first place,” Esha Bhandari, one of the ACLU attorneys who represents the anonymous Twitter user, told the Huffington Post.

“Speaking anonymously about issues of the day is a longstanding American tradition, dating back to when the framers of the Constitution wrote under pseudonyms. The anonymity that the First Amendment guarantees is often most essential when people criticize the government, and this free speech right is as important today as ever.”

The anonymous Twitter account thanked the social media company and ACLU on Friday, which announced it would represent the user to protect their right to anonymous speech on the platform.