[FEATURE]: update all endpoints to the User Table to support the new dynamo layout

[ssh51117]

Feature Name

Update all endpoints (crud) to the user table be compatible with the new table layout

Your Name

Seth Shi

Description

Update the endpoints to the User Table in the backend to reach the new table layout shown below:

This includes making the create, update, delete, and get endpoints for the User table table with the correct parameters as well as creating unit tests for each endpoint, to be done in subtasks:

• create endpoint
• update endpoint by uid
• get endpoint by uid

[github-actions]

Hello @ssh51117! Thank you for submitting the Feature Request Form. We appreciate your contribution. 👋

We will look into it and provide a response as soon as possible.

To work on this feature request, you can follow these branch setup instructions:

1. Checkout the main branch:

```
 git checkout nextjs
```

2. Pull the latest changes from the remote main branch:

```
 git pull origin nextjs
```

3. Create a new branch specific to this feature request using the issue number:

```
 git checkout -b feature-1124
```

Feel free to make the necessary changes in this branch and submit a pull request when you're ready.

Best regards,
Deep Learning Playground (DLP) Team