src/main/java/com/authlete/jaxrs/api/AuthleteApiImpl.java
private String createServiceOwnerCredentials(AuthleteConfiguration configuration)
    {
        if (configuration.getServiceOwnerAccessToken() != null)
        {
            return "Bearer " + configuration.getServiceOwnerAccessToken();
        }
        else
        {
            String key    = configuration.getServiceOwnerApiKey();
            String secret = configuration.getServiceOwnerApiSecret();

            return new BasicCredentials(key, secret).format();
        }
    }
private String createServiceOwnerCredentials(AuthleteConfiguration configuration)
    {
        if (configuration.getServiceOwnerAccessToken() != null)
        {
            return "Bearer " + configuration.getServiceOwnerAccessToken();
        }
        else
        {
            String key    = configuration.getServiceOwnerApiKey();
            String secret = configuration.getServiceOwnerApiSecret();

            return new BasicCredentials(key, secret).format();
        }
    }
Create an authorization header for the service owner.