[CLI-61] card-create-private results in request error "custom identity's validation token is incorrect"
[CLI-61] card-create-private results in request error "custom identity's validation token is incorrect"

1. Create an application at the dashboard and download it's Private and Public Keys.
2. Generate validation token based on application's private key (identity-confirm-private).
3. Сreate a Private Virgil Card (card-create-private) using this validation token.

*Actual Result*
Error: Failed action: create a Virgil Card. HTTP response: request error. Custom identity's validation token is incorrect.

*Expected Result*
A Private Virgil Card is created.

VirgilSecurity/virgil-cli