Challenge `@billmckay` to complete `example-coding-assignment`

[feel-the-beat]

/challenge @BillMcKay

[feel-the-bot]

Created challenge beat-interviewing/example-coding-assignment-billmckay-60b for @BillMcKay.

When ready, use /join @billmckay to invite them as a collaborator.

[feel-the-beat]

/join

[feel-the-bot]

Granted @feel-the-beat access to beat-interviewing/example-coding-assignment-billmckay-60b

[feel-the-beat]

/delete