🐛 Bug Report: `createEmailPasswordSession` returning a 401 Unauthorized if a user is already logged in

### 👟 Reproduction steps When I log in with a user that is already logged in, it throws a 401. ### 👍 Expected behavior Look, I get the idea behind this, but a 401 means unauthorized. That is an error. If the user is already logged in and you recognize the session and someone asks for login, just do anything with a successful message that indicates the email/password was accepted as successful (since that's what I asked) and then reuse the session that exists, or generate a new one every time. ### 👎 Actual Behavior It throws an unauthorized error like something was wrong. ### 🎲 Appwrite version Version 1.5.x ### 💻 Operating system Linux ### 🧱 Your Environment _No response_ ### 👀 Have you spent some time to check if this issue has been raised before? - [X] I checked and didn't find similar issue ### 🏢 Have you read the Code of Conduct? - [X] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)