Login and password for whatsapp?

Question

.NET

Downloaded implementation of WhatsApp API for C#.
Now I don’t understand what is required of me for authorization:
In addition to the number, you need to specify a nickname and password, but what is it and where can I get them?
After all, WhatsApp only requires a number + a code from SMS.
Screen attached

Answer 1

Have you tried reading the documentation?
When registering a number, a code will be sent to you by SMS. Then you register this code from SMS - in response you will receive a password.
Nick is optional.

Answer 2

On the WhatsApp website, there is not a single inscription on the API. Are you sure it exists?