/// <summary>
/// registers a user
/// </summary>
/// <param name="email">email of user</param>
/// <param name="username">username of user</param>
/// <param name="password">password of user</param>
/// <returns></returns>
public static User RegisterUser(string email, string username, string password)
{
var id = DbUser.InsertUser(email, username, password);
return(new User(id));
}
