refactor: reuse constants for redis db

go/cmd/orion/main.go

@@ -27,13 +27,8 @@ import (
 	"google.golang.org/grpc/credentials/insecure"
 )
 
-const (
-	// FIX: Use separate redis instance. We start with higher number because use this same instance in helios.
-	REDIS_DATABASE_FOR_AUTH int = 4
-)
-
 func redisForAuth() *redis.Client {
-	return internal.ConnectAndTestRedis(REDIS_DATABASE_FOR_AUTH)
+	return internal.ConnectAndTestRedis(db.RedisDBAuth)
 }
 
 func main() {