Increase the number of request/s for sign_in/sign_up

backend/src/hash.rs

@@ -6,6 +6,8 @@ use argon2::{
 };
 
 fn get_argon2<'k>() -> Argon2<'k> {
+    // Note: It's not neccessary to have only one Argon2 object, creating a new one
+    // when we need it is lightweight.
     Argon2::new(
         argon2::Algorithm::Argon2id,
         argon2::Version::V0x13,