verify new or changed email address flow

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Verify new/changed email address flow

Many modern web applications require users to verify their email address at one point or another. This is especially important when you have a billing process that sends receipts to your users.

https://dockyard.com/blog/2017/09/06/adding-email-verification-flow-with-phoenix

Expected Behavior

1. A user registers or adds an email to their account
2. Your application generates a unique token that is tied to the user
3. An email is sent to the user’s email address with a link to click
4. User navigates to link in their browser and has their email address verified

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backend consideration: https://hexdocs.pm/bamboo/readme.html
https://github.com/pablo-co/bamboo_postmark

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Support for multiple credentials

Before we run our migrations, we need to make one change to the generated migration to enforce data integrity of user account credentials. In our case, we want a user’s credentials to be deleted when the parent user is removed.

https://hexdocs.pm/phoenix/1.3.0-rc.3/contexts.html#content