Use deferred file close.

main.go

@@ -57,6 +57,7 @@ func readMessage(messageFilePath string) (string, error) {
 	if err != nil {
 		return output, fmt.Errorf("readMessage: %w", err)
 	}
+	defer file.Close()
 	scanner := bufio.NewScanner(file)
 	scanner.Split(bufio.ScanLines)
 	for scanner.Scan() {
@@ -73,11 +74,6 @@ func readMessage(messageFilePath string) (string, error) {
 		}
 	}
 
-	err = file.Close()
-	if err != nil {
-		fmt.Println("error while closing file:", err)
-	}
-
 	return output, nil
 }
 

parseconfig.go

@@ -85,6 +85,7 @@ func parseConfig(configPath string) (configuration, error) {
 	if err != nil {
 		return output, fmt.Errorf("parseConfig: failed to open config file: %w", err)
 	}
+	defer file.Close()
 	scanner := bufio.NewScanner(file)
 	scanner.Split(bufio.ScanLines)
 
@@ -138,10 +139,6 @@ func parseConfig(configPath string) (configuration, error) {
 			}
 		}
 	}
-	err = file.Close()
-	if err != nil {
-		fmt.Println("error closing file:", err)
-	}
 
 	// Check if the username is a valid JID
 	output.username, err = MarshalJID(output.username)