Working auth and photo json endpoint

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

vendor/github.com/dsoprea/go-iptc/utility.go

@@ -0,0 +1,25 @@
+package iptc
+
+import (
+	"bytes"
+	"fmt"
+
+	log "github.com/dsoprea/go-logging"
+)
+
+// DumpBytesToString returns a stringified list of hex-encoded bytes.
+func DumpBytesToString(data []byte) string {
+	b := new(bytes.Buffer)
+
+	for i, x := range data {
+		_, err := b.WriteString(fmt.Sprintf("%02x", x))
+		log.PanicIf(err)
+
+		if i < len(data)-1 {
+			_, err := b.WriteRune(' ')
+			log.PanicIf(err)
+		}
+	}
+
+	return b.String()
+}