I used this from the article, hopefully I filled in the blanks correctly.

Re: Opt-out of arbitration clause in agreement dated 04/15/24

Dear Sir or Madam:

I am writing to opt out of the arbitration clause in my agreement with Discord dated 04/15/24 for the Communication client Discord.

If you have any questions, you may reach me at the address above.

Yours sincerely,

[My username, legal name, and ID.]