post https://api.sandbox.co.in/gst/compliance/e-way-bill/tax-payer/authenticate
E-Way Bill Authentication API takes API credentials set on the E-Way Bill portal (NIC) and gives the E-Way Bill access token in response. If you have not created API credentials, follow the steps here to create them.
API user credentials created on e-Invoice portal can be used for E-Way Bill APIs.
API not in production.
