Once you have a user account confirmed, you can then call the API to receive an authentication token.
passing the headers
- Content-Type: application/x-www-form-urlencoded
And the form parameters
- username: your optiseller username
- password: your optiseller password
and you will receive an authentication token.
Any subsequent requests to the api should include this token as a header:
Authorization: bearer <token>
(so the value is bearer space token)