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[MUSIC]

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With the registration part of the app
in place it's time to add the log in

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functionality.

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In this part of the course
we'll add a log in form so

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users who've already registered can
log into the website. In addition we'll

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add a profile page to show the details for
a logged in user.

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This page should only be visible
to someone who's logged in.

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In other words, we need to add
authentication to the profile page.

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In the process, I'll teach you how to
handle HTTP's stateless protocol, so

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that we can keep track of our
users as they visit our site.

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As users click from page to page
in our site, we'll use cookies and

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sessions to keep track of
users that are logged in.

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Let me show you what we gonna build
in the section of the course.

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We'll add a log in form and
a post route that does a few things.

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It makes sure the user supplies values for
email and password.

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It makes sure the supplied email and
password match a user in the database, and

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finally, it authenticates users so
that they can visit the profile page and

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see information specific to them.

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To do this, we'll need to add
a new behind the scenes feature

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to deal with the stateless
nature of the HTTP protocol.

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Time to learn about sessions and cookies.