Add err to message when config write fails in azd login (#1372)

Add err to message when config write fails in `azd login`. Also, address false-positive warning of `AZD_DEBUG` not set in `--debug` mode.

Co-authored-by: Wei Lim <[email protected]>

cli/azd/cmd/middleware/debug.go

@@ -33,7 +33,12 @@ func (m *DebugMiddleware) Run(ctx context.Context, next NextFn) (*actions.Action
 		return next(ctx)
 	}
 
-	debug, err := strconv.ParseBool(os.Getenv("AZD_DEBUG"))
+	debugStr := os.Getenv("AZD_DEBUG")
+	if debugStr == "" {
+		return next(ctx)
+	}
+
+	debug, err := strconv.ParseBool(debugStr)
 	if err != nil {
 		log.Printf("failed converting AZD_DEBUG to boolean: %s", err.Error())
 	}

cli/azd/pkg/config/manager.go

@@ -57,7 +57,7 @@ func (c *manager) Save(config Config, filePath string) error {
 
 	err = os.WriteFile(filePath, configJson, osutil.PermissionFile)
 	if err != nil {
-		return fmt.Errorf("failed writing configuration data")
+		return fmt.Errorf("failed writing configuration data: %w", err)
 	}
 
 	return nil