diff --git a/services/identity/src/constants.rs b/services/identity/src/constants.rs
--- a/services/identity/src/constants.rs
+++ b/services/identity/src/constants.rs
@@ -11,6 +11,8 @@
 pub const USERS_TABLE_REGISTRATION_ATTRIBUTE: &str = "pakeRegistrationData";
 pub const USERS_TABLE_USERNAME_ATTRIBUTE: &str = "username";
 pub const USERS_TABLE_USER_PUBLIC_KEY_ATTRIBUTE: &str = "userPublicKey";
+pub const USERS_TABLE_USERNAME_INDEX: &str = "username-index";
+pub const USERS_TABLE_WALLET_ADDRESS_INDEX: &str = "walletAddress-index";
 
 pub const ACCESS_TOKEN_TABLE: &str = "identity-tokens";
 pub const ACCESS_TOKEN_TABLE_PARTITION_KEY: &str = "userID";