Clarify single email for MFA

[kunisen]

Description

In a recent internal discussion, @alxchalkias shared his insights that we could update the doc to make it more clear that we only support one email factor.

This PR is to address this context piece.

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cloud-account/multifactor-authentication.md

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[alxchalkias]

LGTM!

[yetanothertw]

Thank you for adding this!
I've left a very minor editorial suggestion, in case you'd like to implement it.

[eedugon]

I'm totally ok with the change, but I'd like to highlight that ideally we should try to get rid of the entire FAQ at some point (I worked with the migration of this section of the docs, and I don't remember there was this big FAQ here 🤦 )

From a tech writing and communication perspective it would be much better to identify the key items of the questions and introduce them properly within the doc, so the most important items are correctly highlighted and the narrative makes more sense.

But once said that, and considering we already have this FAQ, I'm ok with adding more questions until we decide to change it.

cc: @shainaraskas

PS - If @alxchalkias and @shainaraskas agree with it we could also create an issue to restructure this page and ensure we cover all items without the need of a FAQ, as after reading the questions I think it should be pretty straightforward. Of course this wouldn't be a task for @kunisen , but for us (core-docs team).

[eedugon]

LGTM too!

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[kunisen]

for us (core-docs team).

Thanks @eedugon!
IMHO it would be a huge effort to rewrite, which would be best to take some time to think and do it.
So from my point of view, it would be best to merge the current one first, and feel free to make further edits at your convenience. 🙏

That said, I will go and merge this one, but feel free to tweak the structure to avoid FAQ style if needed.
Thank you all!

[alxchalkias]

PS - If @alxchalkias and @shainaraskas agree with it we could also create an issue to restructure this page and ensure we cover all items without the need of a FAQ, as after reading the questions I think it should be pretty straightforward. Of course this wouldn't be a task for @kunisen , but for us (core-docs team).

I agree we could restructure the page, but this isn't a very high prio thing to do, so I'd let core-docs team decide on the timing of this.