write function to get env variables

utils/utils.go

@@ -2,6 +2,7 @@ package utils
 
 import (
 	"math/rand"
+	"os"
 	"time"
 )
 
@@ -15,3 +16,14 @@ func GenerateUniqueID() uint32 {
 func GenerateSongKey(songTitle, songArtist string) string {
 	return songTitle + "---" + songArtist
 }
+
+func GetEnv(key string, fallback ...string) string {
+	if value, ok := os.LookupEnv(key); ok {
+		return value
+	}
+
+	if len(fallback) > 0 {
+		return fallback[0]
+	}
+	return ""
+}