Revert "CM-1485-do not call setSecret (#333)"

[alexander2001i]

This reverts commit a541431.

[github-actions]

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Type	Occurrences	Fixable
Errors	0	0
Warnings	1	0
Ignored	0	N/A

• Result: ✅ success

• Annotations: 1 total

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[warning] @typescript-eslint/explicit-function-return-type

Require explicit return types on functions and class methods

• packages/firebase/functions/src/notification/email/mailer.ts Line 8 - Missing return type on function.

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^{Report generated by eslint-plus-action}