Emit better diagnostics on login failure
Emit better diagnostics on login failure

agrandville/pkcs11test,Yubico/pkcs11test,Yubico/pkcs11test,Yubico/pkcs11test,google/pkcs11test,google/pkcs11test,google/pkcs11test,agrandville/pkcs11test,Yubico/pkcs11test,google/pkcs11test