[CentOS] echo password into bash script

Hey guys,

 I'm trying to echo my password into some commands inside of a bash script.
But I think I'm going about it incorrectly.

Here's the top part of my script:

#!/bin/bash
pub="~/.ssh/id_rsa.pub"
dps_pass="my_pass"
ssh="/usr/bin/ssh"
scp="/usr/bin/scp"
for i in 10.10.10.2{5,6}
do
echo "xfring key up"
echo $dps_pass |  $scp $PUB  digitalplatform@$i:


And here's how it executes:

 #bash -x deploy_key.sh
+ pub='~/.ssh/id_rsa.pub'
+ dps_pass='nbcuV01P!'
+ ssh=/usr/bin/ssh
+ scp=/usr/bin/scp
+ for i in 10.10.10.2{5.6}
+ echo 'xfring key up'
xfring key up
+ echo 'my_pass'
+ /usr/bin/scp /Users/my_user/.ssh/id_rsa.pub digitalplatform at 10.10.10.25:
Password:

Can someone please let me know where I'm going wrong?

Thanks
Tim
-- 
GPG me!!

gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B