Add logs for refresh token test

main.go

@@ -105,7 +105,12 @@ func main() {
         fmt.Println(time.Now().Format("2006-01-02 15:04:05"), "- New token request")
 		query := r.URL.Query()
 		fmt.Println(query)
-		fmt.Println(r.Body)
+
+		contents, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			fmt.Println(err)
+		}
+		fmt.Println(string(contents))
 
 		clientId := query.Get("client_id")
 		clientSecret := query.Get("client_secret")