[RESOLVED] Bash SED command - Adding text to end of file

[DonCash]

Hey,

I'm using the Unix SED command to try and add text to the end of a file.

Here is my current example:

#!/bin/bash

sed "s/./username/" users.txt

This adds 'username' to the beginning of every line in the users.txt file.

Example:

username john1
username mary2
username hiller3

How can I make it so that it adds this just once at the very bottom of the file?

Desired output:

john1
mary2
hiller3
username

Cheers for your help!!