Remove redundant db calls from Login rest endpoint

**Description:**

when I was testing the login endpoint I noticed in jaeger that it calls the db 2 times, the first db call to get the `name` and `password_hash` and in the second call it gets `deactivated` status. instead of making it two queries, I suggest to make it in one query.

here is a screenshot for you:


the suggested new query

```sql
SELECT name, password_hash, deactivated FROM users WHERE lower(name) = lower(name)
```

also, you should remove the `name` from the select query because you already have it.