To be able to authenticate your API calls, you need to have basic credentials. Your credentials are the base64 encoding of your username and password. This can be generated in a number of ways, but one method is to use the shell:
echo -n '<username>:<password>' | openssl base64
This will return your personal credentials to be used in all future API calls as BasicCreds.
All API requests to the server must be authenticated by including your credentials in a header that looks like the following:
--header 'Authorization: BasicCreds <your-credentials>'
Where your-credentials is replaced with your personal key, as generated above.