Refactor Flask REST API

[dhirensr]

catching some exceptions which were previously not caught in views of the api and change variable names for readability.

Pull Request Template

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

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• [x] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

running flask locally

Additional Context (Please include any Screenshots/gifs if relevant)

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Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules
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