Hello
I am investigating Reckon Account Hosted API using Postman.
I am able to understand and implement by PHP regarding Authentication such as get token by authentication code or refresh token.
However, I couldn't proceed for next step because I couldn't get book value which is required almost every api via Postman. E.g. "{{url}}/{{book}}/companyinfo" according to Postman.
How can I get this value from anywhere?