refactor: migrate logger

backend/utils/utils.go

@@ -50,9 +50,9 @@ func GenerateToken(username string) string {
 	return hex.EncodeToString(sum[:])
 }
 
-// GenerateSalt returns a random salt in the inclusive range [0, 6172748].
+// GenerateSalt returns a random salt in the inclusive range [0, 6172748).
 func GenerateSalt() int {
-	return rand.Intn(6172749)
+	return rand.Intn(6172748)
 }
 
 // ComputePasswordHashWithSalt returns the lowercased SHA-256 hex digest of