Where can I get a vault access card?

Where can I get a vault access card? - Woman in Brown Coat Holding a Bank Card

In my campaign, I keep seeing missions that say I need to bring a vault access card. So far I haven't found any though. Where can they be obtained?

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Where can I get a vault access card? - Person Paying Using Her Smartwatch

Where can I get a vault access card? - Side view of crop unrecognizable female in stylish clothes using credit card while buying metro ticket via electronic machine

Where can I get a vault access card? - Turned on Silver Laptop Computer

Lets Explore: Fallout 4 Vault 75 and Where to find the Admin card

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