Here are the steps for creating multiple users same time in batch mode.

username and passwords are stored in clear text format make sure only root can read/write the file. Use chmod command:

admin@smartproteam$ touch /root/multipleusers.txt
admin@smartproteam$ chmod 0600 /root/multipleusers.txt

Create a user list as follows:

admin@smartproteam$ gedit /root/multipleusers.txt

Append username and password:
ram:pass1980:500:500:ram sagar:/home/ram:/bin/bash
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Now create users in batch:
admin@smartproteam$ newusers /root/multipleusers.txt