fix token claims creation

src/accounts.rs

@@ -136,7 +136,7 @@ pub fn create_id_token_claims(
     let choose = |what: &str, from: &[&'static str]| {
         let tag = hmac::sign(&mangler, (what.to_owned() + client_id).as_bytes());
         let mut bytes: [u8; 4] = [0; 4];
-        bytes.copy_from_slice(tag.as_ref());
+        bytes.copy_from_slice(&tag.as_ref()[..4]);
         from[i32::from_le_bytes(bytes) as usize % from.len()]
     };