Retrieve the signature authentication methods configuration.

Retrieve the configuration of all signature authentication methods that is used in IBM Verify instances or in the custom mobile authenticators that are built from the IBM Verify SDK.

The signature authentication method provides a means of second factor authentication of an external entity through the use of digital signatures. The concept of sub types allows for the configuration of different strength signatures for different runtime use cases.

Entitlements:
- readMFAMethods (Read second-factor authentication method configuration)
- manageMFAMethods (Manage second-factor authentication method configuration)