Copy remote files with expect and scp

[nokye]

Hello, i want to copy a file from various accounts on a server, and save each file in different directories.Then i write a bash script :

#!/bin/bash 
FILE=$1
HOST=$2
IFS=: 
while read LOGIN PASS 
do 
mkdir $LOGIN 
expect -c " 
spawn scp $LOGIN(AT)$HOST:programas/$FILE $LOGIN/$FILE 
expect { 
"password:" { send $PASS\r\n; interact } 
eof { exit } 
} " 
done< iplogins

I have a text file where i have the list of logins and passwords in the form:
login1: pass1
login2: pass2

But the script copy only the file from the first login(sometimes don't copy anything) and stops in the first iteration of while... as if the expect have break of c/c++

The code without the while works fine, but i want to copy the file from all accounts, not one by one.

[tetsujin]

Instead of using expect to send a password to scp, why not use an ssh key pair to bypass password authentication altogether?