There are a few standard credential types like ISO 18013-5 mobile driver's license or W3C Verifiable Credentials.
Smartphone are available that can securely store credentials and proof the holder's presence and ownership of the credentials.
There are wallet apps that can required mobile credentials and release only that information that is needed for the user purpose.
The purpose of the access can be specified or determined by the user.
The purpose will determine the data required by the user. (This is definition of purpose for this user story.)

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