💻 6103 allow existing users to subscribe to the newsletter

[AnneliesVlaar]

Fixes #6103

How to test

Follow these steps to verify this PR works as intended:

• Log in as a teacher
• Go to my account
• Go to my personal settings
• 3 checkboxes are added: subscribe to newsletter, pair to teacher, pair to guest teacher

WIP
[x] front end
[ ] connect checkbox to database

[boryanagoncharenko]

I have the following proposal. Let's add a new section in the profile page which is only about the newsletter. It should be very short and perhaps we could even choose to make it expanded by default (if there are not any other sections that need to be expanded by default such as invitations). Also, since we are on this page, let's take the delete button out of the form since it is confusing.

So, if a user has never subscribed they will see this:

If they have subscribed and then unsubscribed, they will see this:

And this is how the delete profile section will look like:

What do you think?

[AnneliesVlaar]

Good idea to add a delete profile section

[AnneliesVlaar]

If a user subscribed to the newsletter and then via the link in the newsletter unsubscribed, do we know who is subscribed and unsubscribed?

[boryanagoncharenko]

If a user subscribed to the newsletter and then via the link in the newsletter unsubscribed, do we know who is subscribed and unsubscribed?

Yes, we do:

• if the user has never subscribed, they are not in the Mailchimp audience
• if the user has subscribed, we see that their status is "subscribed"
• if the user has unsubscribed, their status is "unsubscribed"

Btw I did not cover how this section will look for the people who are already subscribed. I guess the section should not be there at all?

[AnneliesVlaar]

Ah that's great. For people who already subscribed I would suggest to have something similar to the unsubscribed:

You're subscribed to our newsletter
Run to your mailbox to see if the new issue already has been delivered!

(Or something like that)