Revert "Merge pull request #29 from Keyclic/feat/allow-null-values"
Revert "Merge pull request #29 from Keyclic/feat/allow-null-values"

This reverts commit e16535be58cb6c35017cacd2a32485dbd1865928.

Keyclic/keyclic-sdk,Keyclic/keyclic-sdk,Keyclic/keyclic-sdk,Keyclic/keyclic-sdk