Juul Labs Inc. agreed to pay $40 million to the state of North Carolina to settle a lawsuit alleging that the e-cigarette maker had targeted underage users, resolving the first of a string of legal and regulatory challenges facing the once-hot startup.The lawsuit by the attorney general of North Carolina was condemned to go trial in July, one of the hundreds of similar cases brought against the vaping company by state officials, school districts, and young people. Those cases are pending.North Carolina’s lawsuit alleged that Juul built and marketed its e-cigarettes to attract teenagers and misstated the potency of their nicotine.Juul has stated that it didn’t target young people and is working to regain the public’s trust.As part of the North Carolina settlement, revealed by state Attorney General Josh Stein on Monday, a trove of internal Juul documents will be deposited at a North Carolina university and will be made available to the public by July 2022. The settlement funds, to be paid over six years, will support scientific research on youth vaping cessation and curbing youth use.