Question: Fix getUserName so that it returns the user's name as LastName, FirstName (without the quotes). Capitalise the first letter of the first and last names

Fix getUserName so that it returns the user's name as "LastName, FirstName" (without the quotes).

Capitalise the first letter of the first and last names

If the lastname is null, just return firstname without a comma

e.g. "John" "Smith" should return "Smith, John"

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