diff --git a/onchain/src/systems/player_actions.cairo b/onchain/src/systems/player_actions.cairo
index b43b0f1..eec2ba1 100644
--- a/onchain/src/systems/player_actions.cairo
+++ b/onchain/src/systems/player_actions.cairo
@@ -1,12 +1,12 @@
 use starknet::{ContractAddress};
 use starkludo::models::{player::{Player, PlayerTrait}};
 
-mod Errors {
-    const ADDRESS_ZERO: felt252 =  'Cannot create from zero address';
-    const USERNAME_TAKEN: felt252 =  'username already taken';
-    const USERNAME_NOT_FOUND: felt252 =  'player with username not found';
-    const USERNAME_EXIST: felt252 =  'username already exist';
-    const ONLY_OWNER_USERNAME: felt252 =  'only user can udpate username';
+pub mod Errors {
+    pub const ADDRESS_ZERO: felt252 =  'Cannot create from zero address';
+    pub const USERNAME_TAKEN: felt252 =  'username already taken';
+    pub const USERNAME_NOT_FOUND: felt252 =  'player with username not found';
+    pub const USERNAME_EXIST: felt252 =  'username already exist';
+    pub const ONLY_OWNER_USERNAME: felt252 =  'only user can udpate username';
 }
 
 #[dojo::interface]