There's sample code in SDK package to change authentication mode but you can change it to required operation using BS2AuthConfig structure. 

If you set BS2AuthConfig.authSchedule[Value], you will be able to change. 


ValueCodeDescription
0BS2_AUTH_MODE_BIOMETRIC_ONLYBiometric only
1BS2_AUTH_MODE_BIOMETRIC_PINBiometric + PIN
2BS2_AUTH_MODE_CARD_ONLYCard only
3BS2_AUTH_MODE_CARD_BIOMETRICCard + Biometric
4BS2_AUTH_MODE_CARD_PINCard + PIN
5BS2_AUTH_MODE_CARD_BIOMETRIC_OR_PINCard + Biometric or PIN
6BS2_AUTH_MODE_CARD_BIOMETRIC_PINCard + Biometric + PIN
7BS2_AUTH_MODE_ID_BIOMETRICID + Biometric
8BS2_AUTH_MODE_ID_PINID + PIN
9BS2_AUTH_MODE_ID_BIOMETRIC_OR_PINID + Biometric or PIN
10BS2_AUTH_MODE_ID_BIOMETRIC_PINID + Biometric + PIN


Please refer to the attached C# sample code to see details.