add channel to sign_in and sign_up options

[silentworks]

What kind of change does this PR introduce?

Add missing feature

What is the current behavior?

When using phone auth you can only use sms as a channel

What is the new behavior?

When using phone auth you can now use sms or whatsapp as a channel

Additional context

Add any other context or screenshots.

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[J0]

Looks good, please test before merging