Guess you need to make your own code

you can find all the members like this

foreach (MembershipUser membershipUser in System.Web.Security.Membership.GetAllUsers())
{
    IUser user =  CommunitySystem.CurrentContext.DefaultSecurity.GetUserByUserName(membershipUser.UserName);

Is this a one-time thing or something you want to do regularly?

As a one-time-thing, you have all the users in an SQL Server table, tblEPiServerCommonUsers. If you want to do this regularly, you'd want to use code to do it. Going directly to the Community APIs is the most efficient way:

foreach (EPiServer.Common.Security.IUser user in EPiServer.Common.Security.SecurityHandler.Instance.GetUsers())
{
    //user.UserName
    //user.EMail
}