Removed utils mod, moved hexing the name to entity library

entity/Cargo.toml

@@ -16,3 +16,4 @@ sqlx = { version = "0.7", features = [
     "macros",
     "migrate",
 ], default-features = false }
+hex = "0.4"

entity/src/account.rs

@@ -93,13 +93,14 @@ impl Account {
             .map(|_| ())
     }
 
-    /// Gets a name by a hex of a SHA256 hash of the name
+    /// Gets a name by a SHA256 hash of the name
     #[inline]
     pub async fn get_name_by_hash(
         user_id: u64,
-        hash: String,
+        hash: &[u8],
         pool: &Pool,
     ) -> crate::Result<Option<String>> {
+        let hash = hex::encode(hash);
         let name = query_as::<_, (String,)>(
             "SELECT `name` FROM `account` WHERE SHA2(`name`, 256) = ? AND `user_id` = ?;",
         )