Refactor db_connector.py

[arvimal]

I've selected db_connector.py for refactoring, which is a module of 28 lines of code that couples the top-level components tightly. Addressing this will make our codebase more maintainable and improve Better Code Hub's Couple Architecture Components Loosely guideline rating! 👍

Here's the gist of this guideline:

• Definition 📖
  Minimize the amount of interface code; that is, code in modules that are both called from and call modules of other components ("throughput"), and code in modules that are called from modules of other components ("incoming").
• Why❓
  Having loose coupling between top-level components makes it easier to maintain them in isolation.
• How 🔧
  You can hide a component's implementation details through various means, e.g. using the "abstract factory" design pattern.

You can find more info about this guideline in Building Maintainable Software. 📖

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ℹ️ To know how many other refactoring candidates need addressing to get a guideline compliant, select some by clicking on the 🔲 next to them. The risk profile below the candidates signals (✅) when it's enough! 🏁

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Good luck and happy coding! ✨ 💯