Implement email confirmation for parental controls (send_confirmation/pin/:email)

[ItzSwirlz]

Resolves #96

Changes:

• Implements the send_confirmation/pin/:email route. Same method as resend_confirmation but gets the PNID from the database via email address instead off PID.

• I have read and agreed to the Code of Conduct.

• I have read and complied with the contributing guidelines.

• What I'm implementing was an approved issue.

• I have tested all of my changes.

[jonbarrow]

Other than this, looks good to me :+:

[DaniElectra]

This is not accurate to what the real endpoint does, this endpoint is used to send a "confirmation" email that the email has been registered on Parental Controls (see #27). It would make more sense to use sendEmailConfirmedEmail(), if anything.

[ItzSwirlz]

This is not accurate to what the real endpoint does, this endpoint is used to send a "confirmation" email that the email has been registered on Parental Controls (see #27). It would make more sense to use sendEmailConfirmedEmail(), if anything.

Should I make a new function sendParentalControlsConfirmedEmail() for this purpose?

[ItzSwirlz]

It works. 102-2534 is no longer shown when changing email address.