[sudo-users] Unable to change user in script

[Steffen.A.Johnson at wellsfargo.com]

I wrote the following ksh script to automatically change the user ID. 

 

#!/usr/bin/ksh

PASSWD=test1

 

sudo -S su - otheruser << EOF

   echo $PASSWD

EOF 

 

When I run the script the passwd is passed to the su command properly but I
get the following

error message every time I run the program

 

Password:

Sorry, try again.

Password:

sudo: 1 incorrect password attempt

 

I've checked that I am user "test1_user" and my passwd is test1.

 

Does anyone have any clues of why my script is failing?

 

TIA

 

Steffen