feat(user): replace space in username with -

internal/service/user_common/user.go

@@ -151,7 +151,7 @@ func (us *UserCommon) MakeUsername(ctx context.Context, displayName string) (use
 		}
 	}
 
-	username = strings.ReplaceAll(displayName, " ", "_")
+	username = strings.ReplaceAll(displayName, " ", "-")
 	username = strings.ToLower(username)
 	suffix := ""
 

pkg/random/random_username.go

@@ -1,8 +1,8 @@
 package random
 
 import (
+	"crypto/rand"
 	"encoding/hex"
-	"math/rand"
 )
 
 func UsernameSuffix() string {