lib1.go

package mylib

import "net/http"

// Config contains all library configuration data
type Config struct {
	Username string
	Password string
}

type Instance struct {
	client http.Client
}

// New create a new Instance of mylib
func New(c *Config) (*Instance, error) {

	// create an http client where the basic credentials
	// are injected automatically into requests.
	client, err := // ...

	return &Instance{
		client: client,
	}, nil
}