Also lowercase the username when checking if it exists.

Author: sandhose

crates/storage-pg/.sqlx/query-94fd96446b237c87bd6bf741f3c42b37ee751b87b7fcc459602bdf8c46962443.json renamed to crates/storage-pg/.sqlx/query-7f8335cc94347bc3a15afe7051658659347a1bf71dd62335df046708f19c967e.json

@@ -250,7 +250,7 @@ impl UserRepository for PgUserRepository<'_> {
         let exists = sqlx::query_scalar!(
             r#"
                 SELECT EXISTS(
-                    SELECT 1 FROM users WHERE username = $1
+                    SELECT 1 FROM users WHERE LOWER(username) = LOWER($1)
                 ) AS "exists!"
             "#,
             username