post https://test-api.tbcbank.ge/xs2a-sandbox/psd2/openbanking/oauth/bc-authorization
The Backchannel Authentication Endpoint is used to initiate an out-of-band authentication of the end-user.
This is done by sending an HTTP POST message directly from the Client to the OpenID Provider's Backchannel Authentication Endpoint, using a request defined in the following subsections.