Script does nothing

[Jannik44]

i just downloaded the script and it looks like it just does nothing at all, why is this? i also have no logs because it just says nothing, i followed that tutorial: https://www.youtube.com/watch?v=rI-XxnyWFnM
the problem must be that script because my internet works fine and it was working before, i just decided to add that script just in case the ip changes (it does change usually every 6 months at my place)
maybe i made an mistake, i listed my steps below, i hope i did everything right:
(keys are altered)

#!/bin/bash
# change to "bin/sh" when necessary
auth_email="mymail@proton.me" # The email used to login 'https://dash.cloudflare.com'
auth_method="global" # Set to "global" for Global API Key or "token" for Scoped API Token
auth_key="c1fr4b1fa67d25773430fd8ffaab4ag0dd5ad" # Your API Token or Global API Key

zone_identifier="c41602b25d8b8257298b1616aad6d8b0" # Can be found in the "Overview" tab of your domain

record_name="" # Which record you want to be synced
ttl="3600" # Set the DNS TTL (seconds)
proxy="true" # Set the proxy to true or false
sitename="pl.mchost.fun" # Title of site "Example Site"
slackchannel="" # Slack Channel #example
slackuri="" # URI for Slack WebHook "https://hooks.slack.com/services/xxxxx"
discorduri="" # URI for Discord WebHook "https://discordapp.com/api/webhooks/xxxxx"
###########################################
## Check if we have a public IP
###########################################

hope someone can help 👍

[Jannik44]

whoops, looks like i forgot ro set record_name=""

wait, what is sitename doing then?