Add check for deleted accounts in the isValidAlias function call

[lukelee-sl]

Background

The isValidAccount function does not check for deleted accounts.

Acceptance Criteria

Add the check for deleted accounts during function processing.
Add tests to ensure that deleted accounts return false.

Dependencies

No response

Definition of Ready (DoR) Checklist

• Clear acceptance criteria
• Clear and detailed description
• Dependencies identified
• Links to documentation
• Should be completable in 2-3 Days
• Initial draft of Low-level design document
• At least high level test plan
• Groomed/Estimated

Definition of Done (DoD) Checklist

• Acceptance Criteria complete
• No Codacy issues greater than minor (in new code)
• JavaDocs updated/created
• Code commented
• Unit tests created/updated
• 80% test code coverage (in new code)
• Happy Path and major negative cases in HAPI tests as applicable