Is there an api that reads the user's fingerprint from the mobile screen and converts it to a GUID or some other code ?
Or at least for Android or iOS ?
I'm reasonably confident that biometric sensor data is keep unavailable to apps for security purposes.
Its not the business of your app to be able to store user biometric information because then it could spoof it.
Your app asks for biometric confirmation of the user through the OS. Then the OS tells your app whether or not the validation was successful. That's all your app should need or should have access to. Otherwise it becomes a giant security hole.
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