feat(api): Add user cache for optimization

[Z-xus]

Description

Created a cache module using redis provider and used it to cache user for auth.

Fixes #207

Developer's checklist

• [x] My PR follows the style guidelines of this project
• [x] I have performed a self-check on my work

If changes are made in the code:

• [x] I have followed the coding guidelines
• [x] My changes in code generate no new warnings

Documentation Update

• [ ] This PR requires an update to the documentation at docs.keyshade.xyz

[codiumai-pr-agent-free[bot]]

Failed to generate code suggestions for PR

[Z-xus]

Oh, sorry! I was in hurry due to competition. Will do it once reach home.