[BUGS] psql prompting for password. Can we suppress it?

[Pradeep Rai]

Hello,
 
We are trying to perform bulk insert into PostGre database with the help of
a text file (containing n INSERT statements), and then invoking psql command
from a batch file.
 
"psql -d <database name> -f <file-name.sql> -h <server-ip> -U <username>"
 
The issue is that the psql command window prompts for the password. Have you
got any idea how to suppress it? 
 
Thanks in advance.
 
Best Regards,
Pradeep Rai
(New Delhi, India)