The Whip Around app username and passwords are controlled in your dashboard under drivers.
Your account admin will need to login to the dashboard and click on the drivers module from the menu on the left.
Once in the drivers module click on the driver that you would like to edit and then you will be able to edit their profile.  There is a password field that can be reset there. 

You can learn more on how to edit a driver and their password here:

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