@echo off
setlocal ENABLEDELAYEDEXPANSION
set file=alts.txt
for /f "tokens=1,2 delims=:" %%A in (%file%) do (
set "$user=%%A"
set "$pass=%%B"
echo username=!$user! pass=!$pass!
)
pause
Be careful using %username%.
It's a system variable. You can test writing echo %username%
in the CMD prompt. You better choose another name for the Variable like i did.