Twitter has withdrawn its lawsuit against the Trump administration a day after it alleged that U.S. Customs and Border Protection (CBP) officers tried to get the company to reveal the identity of an account critical of the agency.

The company's lawsuit filed Thursday accused CBP of employing an administrative summons typically used for investigating imported merchandise to get Twitter to unmask information about an account called @ALT_uscis.

The account is a parody of the U.S. Citizenship and Immigration Services (USCIS) office and claims to be run by a government employee.

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But in another filing on Friday, lawyers for Twitter said that CBP had withdrawn its summons, essentially dropping the effort to get the company to reveal the identity of the account user.

“On April 7, 2017, counsel for Defendants from the Department of Justice contacted counsel for Twitter, to advise that U.S. Customs and Border Protection has withdrawn the summons and that the summons no longer has any force or effect,” the motion from Twitter's lawyers reads.

“Because the summons has now been withdrawn, Twitter voluntary dismisses without prejudice all claims against Defendants in the above captioned matter."

CBP and USCIS are both part of the Department of Homeland Security, which was named in the lawsuit.

A spokesperson for CBP didn't immediately respond when asked to comment. The Department of Justice declined to comment.

The ACLU joined in on the uproar that followed Twitter's lawsuit Thursday evening, promising to help represent the anonymous user that officials were allegedly trying to unmask.

“The speed with which the government buckled shows just how blatantly unconstitutional its demand was in the first place,” said ACLU attorney Esha Bhandari in a statement Friday. “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.”