You cannot teleport someone to you without their permission. If you try to teleport someone who hasn’t used /call you’ll see the following message:
That person didn’t request a teleport recently. Ask them to /call you (again) if you want to bring them to you.
Sometimes you’ll see this message if they did /call you, but it took too long before you were able to bring them to you. If this happens, just ask them to /call you again. When someone does request a teleport from you, you’ll see this message:
**TELEPORT** username requests a teleport! Use /bring <name> to accept.
To bring someone to you after they request a teleport use /bring or /s (either will work).