Adding persistent storage and working auth

Signed-off-by: Kris Nóva <kris@nivenly.com>

examples/photo.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+
+	photoprism "github.com/kris-nova/client-go"
+	"github.com/kris-nova/logger"
+)
+
+func main() {
+	uuid := "pqnzigq156lndozm" // This is a known ID
+	client := photoprism.New(auth())
+	err := client.Login()
+	if err != nil {
+		halt(4, "Error logging into API: %v", err)
+	}
+	logger.Always("Login Success!")
+	photo, err := client.V1().GetPhoto(uuid)
+	if err != nil {
+		halt(3, "Error fetching photo: %v", err)
+	}
+	bytes, err := json.Marshal(photo)
+	if err != nil {
+		halt(5, "Error: %v", err)
+	}
+	fmt.Println(string(bytes))
+}