Send Emails

[johanstokking]

Summary:

The Identity Server should send (at least essential) emails.

Why do we need this?

Without it, we can't do contact info validation, forgot password functionality.

What is already there? What do you see now?

The email package, as well as some kind of template registry.

What is missing? What do you want to see?

The actual email messages.

How do you propose to implement this?

I think we should start with the essential emails:

• [x] Welcome email for new users, including contact info validation.
• [x] Password Recovery email
• [x] Entity Contact Info Validation email

And then continue with "notification" emails such as:

• [x] Password Changed
• [ ] User Email Changed
• [x] Collaborator added/updated
• [x] API Key created/updated

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Original issue: https://github.com/TheThingsIndustries/lorawan-stack/issues/1395 by @htdvisser

[htdvisser]

Reopening this, since there are still a bunch of TODOs left in the codebase referring to this issue:

https://github.com/TheThingsNetwork/lorawan-stack/blob/fe5b1d5bd568613ebe3549e841d2c8c7a39d00e3/pkg/identityserver/invitation_registry.go#L62

https://github.com/TheThingsNetwork/lorawan-stack/blob/71e4ef8ad894c21bb5069b9ec754b50640362390/pkg/identityserver/user_registry.go#L204

https://github.com/TheThingsNetwork/lorawan-stack/blob/71e4ef8ad894c21bb5069b9ec754b50640362390/pkg/identityserver/user_registry.go#L388

https://github.com/TheThingsNetwork/lorawan-stack/blob/fe135f4b4b6a11b9b8f60ab968b9928d080aca75/pkg/identityserver/client_registry.go#L254