vendor: add github.com/putdotio/go-putio for putio client

vendor/github.com/putdotio/go-putio/putio/error.go

@@ -0,0 +1,25 @@
+package putio
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// ErrorResponse reports the error caused by an API request.
+type ErrorResponse struct {
+	Response *http.Response `json:"-"`
+
+	Message string `json:"error_message"`
+	Type    string `json:"error_type"`
+}
+
+func (e *ErrorResponse) Error() string {
+	return fmt.Sprintf(
+		"Type: %v Message: %q. Original error: %v %v: %v",
+		e.Type,
+		e.Message,
+		e.Response.Request.Method,
+		e.Response.Request.URL,
+		e.Response.Status,
+	)
+}