Add system tests

[shilpabasu22]

Link to Click Up ticket

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Describe this PR

System tests for various GET requests on accounts api

What is the problem we're trying to solve

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What changes have we introduced

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Include any links to commits that introduce significant additions of code if they help explain the process of coming to the solution. e.g Addition of test database setup, addition of first test and production class, removal of buggy code, etc.

Checklist

• Added end-to-end (i.e. integration) tests where necessary e.g to test complete functionality of a newly added feature
• Added tests to cover all new production code
• Added comments to the README or updated relevant documentation (add link to documentation), where necessary.
• Checked all code for possible refactoring
• Code pipeline builds correctly

Follow up actions after merging PR

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[FaisalHackney]

We need a yml file to specify how the values for the following keys are accessed from circle-ci context:

• "AWS_ACCESS_KEY"
• "AWS_SECRET_ACCESS_KEY"
• "AWS_SESSION_TOKEN"