Where do i place this.

Hello , i want to add arena score system to my server.but i dont know where i can place this code from user.cpp and user.h

User.cpp

Code:

#ifdef __ARENA_SCORE
    if( GetWorld()->IsArena() ) // This hook fixes the Score and ID of the player no matter where they are
        if( !g_ArenaScore.IsArenaUser( this ) )
        {
                g_ArenaScore.ArenaOnJoin( this );                // or how they got into thr Arena.

        }
    if( !GetWorld()->IsArena() )
            if( g_ArenaScore.IsArenaUser( this ) )
            {
                    g_ArenaScore.ArenaOnExit( this );
            }
#endif

thanks.:)