If you want to give a user access to the hub, you would need to provide him a token. This is done in the QMC under "license and tokens".
This page describes how the tokens work in more detail: http://help.qlik.com/sense/en-US/online/#../Subsystems/Qlik_Management_Console_help/Content/ServerUserGuide/SUG_Managing…
Hello Supriyo -
please check out this video series for more information on this exact topic:
I believe what you are asking is where do you put the passwords? - You don't. the UDC is for pulling in user attributes to be used for Authorization from a 3rd party source, NOT Authentication. Authentication is handled by default and out of the box by Windows integrated security. If you want to use a custom authentication - you must create a module or use another authentication method.
Please see the videos below:
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