try
{
    const string SharepointDomainAddress = "https://contoso.sharepoint.com";
    const string UserName = "admin@contoso.onmicrosoft.com";
    const string Password = "MyPassword";

    ProjectServerCredentials credentials = new ProjectServerCredentials(SharepointDomainAddress, UserName, Password);

    Project project = new Project("New Project.mpp");

    ProjectServerManager manager = new ProjectServerManager(credentials);
    manager.CreateNewProject(project);
}
catch (ProjectOnlineException ex)
{
    Console.WriteLine(ex.Message);
}