ADB | How do I Authorise Amazon FireTV Stick via. USB? - to run shell script on boot

Goal: Follow this tutorial , to run a shell script on boot. Despite following the tutorial and trying various solutions, I am still unable to authorise the ADB connection. I'd greatly appreciate any help in resolving this issue. Linux:

(base) me@laptop:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.2 LTS
Release:	22.04
Codename:	jammy

(base) danielbell@laptop:~$ curl ifconfig.me
109.144.211.17

FireTV Stick is in Developer Mode and I've both turned OFF and ON and restarted several times: - ADB Debugging - Apps from Unknown Sources In 'My Fire TV' -> 'Network': - 'IP Address:' 100.120.226.156 - 'DNS:' 192.168.22.22

(base) me@laptop:~$ adb version
Android Debug Bridge version 1.0.41
Version 28.0.2-debian
Installed as /usr/lib/android-sdk/platform-tools/adb

(base) me@laptop:~$ adb kill-server
(base) me@laptop:~$ adb start-server
* daemon not running; starting now at tcp:5037
* daemon started successfully

(base) me@laptop:~$ adb devices
List of devices attached
G070L81693920FDB	unauthorized

(base) me@laptop:~$ adb connect 100.120.226.156
missing port in specification: tcp:100.120.226.156
(base) me@laptop:~$ adb connect 100.120.226.156:5555
failed to connect to '100.120.226.156:5555': Connection timed out

(base) me@laptop:~$ adb connect 192.168.22.22
missing port in specification: tcp:192.168.22.22
(base) me@laptop:~$ adb connect 192.168.22.22:5555
failed to connect to '192.168.22.22:5555': Connection timed out