TPP Enrollment API

API for completing enrollment/onboarding to PSD2 APIs to Member and Service
Banks under BEC umbrella. The onboarding step serves to
1) Verify the identity of the TPP
2) Establish and verify the TPP's roles with respect to PSD2 (AISP, PISP,
CBPII)

The enrollment API uses the same general format and mechanisms as specified
in the Berlin Group XS2A…