Login Failure

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It's cool that we can listen to the Czech passport event and cause authentication to fail by throwing any authentication exception like this custom user message authentication exception. But what if instead of the normal authentication failure behavior, where we redirect the log-in page and show the error, we want to do something different, like redirect to a totally different page in just this situation. Well, unfortunately there's not a way on this event, object to control the response. We don't have like a event set response or anything like that. So we can't control the error behavior from here, but we can control what happens when there's an air from a different listener. Then we can have the both listeners work together as a team to do this. We first need to create our own custom authentication exception class. So in the security directory, okay. A new class, it could be called anything. I'll call account, not verified, authentication exception, and then I will make it extend authentication exception. Cool. But I'm going to do nothing in here. It's just going to be a marker interface, a marker class back inside of our subscriber inside of our custom class custom user message authentication exception. Let's now throw account, not verified, authentication exception.

We don't need to pass it. Any message. Now if we stopped right now, that's not very interesting. We are just going to go back to our very odd an an authentication exception occurred message. So leave that for a second. And let's now add another listener. Remember from our debug event that one of the listeners we have is it log-in failure event, which as the name sounds is called every dispense. Every time log-in fails, let's add another listener right in this class for that. So I'll say login failure event calling home class, and then we'll call on log in failure. This case the priority is not, does it won't matter. Okay. Call it function on log-in failure. And we know that this way, pass it along and failure event argument, software that there, and then let's just DD that event to make sure that it's called.

So with any luck, if we fail, if we fail log in, for any reason, this will be caught. So for example, if I put in a bad password here, yes, it hits it. It hits and notice this log and failure event has an exception. Properties had two bad credentials exception. Now let me log in with the correct password and it got hit again. But this time check out the exception. It's our custom account, not verified, authentication exception. So the login failure event object contains the exception that caused a failure. We can use that to know from this method, if authentication failed due to the account, not being verified, if it did, we can do something different. So first it's not, if you're like, let's check for that. If not event arrow, get exception, instance of account, not verified exception, then let's just return. So if it's some other type of exception, we're going to do nothing and let the normal behavior happen down here.

We're going to redirect to a new page. Let's go create that page real quick. So let's do it in source controller, registration controller down here on the bottom. Let's make a new method. I'll call it, send, verify email and above this. We'll add our route that route. How about verify /resend name = app verify three, send email inside of here. I'm not. I'm just going to render a template as a return. This error render registration, oops, /rescind verify email that .html.twig cool inside of the template /registration directory. That's create a new file. Recent verify, email that age channel that twig.

And I'm just going to paste in a template. So there's nothing fancy here at all. It just says, verify your email to explains the situation. And then there's a button to resend the email, which I actually I'll leave that up to you. You can make this go to a new controller that would use the same method of creating the verification email as before. But now that we have a functional page, I'm going to copy this route. And instead of subscriber, all we need to do here is redirect there. Now, the way we do that is that the log-in failure has a set response method where we can take over what happens on log-in failure. Okay. So what we're gonna do here is I'm going to say response = new redirect response, and then we're going to generate a URL to that route. And then ultimately we'll say response error event, arrows, that response response to generate that you were out, we're going to need the router. So I had to, on top of this class, add a construct method,

Spell it correctly. They router interface, router arguments, hit all. Tenter go to initialize properties to create that property and set it and down here, we're in business. This->router->generate then app verify recent email. Oh, that's so cool. So we fail. We call that authentication to fail with this custom exception. We listened to that a customer exception and override what happens on logging failure. Let's try it. So I need to do is refresh this page and got it. Where sent over to /verify /reascend love that next team. Let's do something super cool, super fun, super nerdy. Let's add a two factor authentication to our site complete with QR codes and everything.

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What PHP libraries does this tutorial use?

// composer.json
{
    "require": {
        "php": "^7.4.1 || ^8.0.0",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "babdev/pagerfanta-bundle": "^3.3", // v3.3.0
        "composer/package-versions-deprecated": "^1.11", // 1.11.99.4
        "doctrine/annotations": "^1.0", // 1.13.2
        "doctrine/doctrine-bundle": "^2.1", // 2.4.3
        "doctrine/doctrine-migrations-bundle": "^3.0", // 3.1.1
        "doctrine/orm": "^2.7", // 2.10.1
        "knplabs/knp-markdown-bundle": "^1.8", // 1.9.0
        "knplabs/knp-time-bundle": "^1.11", // v1.16.1
        "pagerfanta/doctrine-orm-adapter": "^3.3", // v3.3.0
        "pagerfanta/twig": "^3.3", // v3.3.0
        "phpdocumentor/reflection-docblock": "^5.2", // 5.2.2
        "scheb/2fa-bundle": "^5.12", // v5.12.1
        "scheb/2fa-qr-code": "^5.12", // v5.12.1
        "scheb/2fa-totp": "^5.12", // v5.12.1
        "sensio/framework-extra-bundle": "^6.0", // v6.2.0
        "stof/doctrine-extensions-bundle": "^1.4", // v1.6.0
        "symfony/asset": "5.3.*", // v5.3.4
        "symfony/console": "5.3.*", // v5.3.7
        "symfony/dotenv": "5.3.*", // v5.3.8
        "symfony/flex": "^1.3.1", // v1.17.5
        "symfony/form": "5.3.*", // v5.3.8
        "symfony/framework-bundle": "5.3.*", // v5.3.8
        "symfony/monolog-bundle": "^3.0", // v3.7.0
        "symfony/property-access": "5.3.*", // v5.3.8
        "symfony/property-info": "5.3.*", // v5.3.8
        "symfony/rate-limiter": "5.3.*", // v5.3.4
        "symfony/runtime": "5.3.*", // v5.3.4
        "symfony/security-bundle": "5.3.*", // v5.3.8
        "symfony/serializer": "5.3.*", // v5.3.8
        "symfony/stopwatch": "5.3.*", // v5.3.4
        "symfony/twig-bundle": "5.3.*", // v5.3.4
        "symfony/ux-chartjs": "^1.3", // v1.3.0
        "symfony/validator": "5.3.*", // v5.3.8
        "symfony/webpack-encore-bundle": "^1.7", // v1.12.0
        "symfony/yaml": "5.3.*", // v5.3.6
        "symfonycasts/verify-email-bundle": "^1.5", // v1.5.0
        "twig/extra-bundle": "^2.12|^3.0", // v3.3.3
        "twig/string-extra": "^3.3", // v3.3.3
        "twig/twig": "^2.12|^3.0" // v3.3.3
    },
    "require-dev": {
        "doctrine/doctrine-fixtures-bundle": "^3.3", // 3.4.0
        "symfony/debug-bundle": "5.3.*", // v5.3.4
        "symfony/maker-bundle": "^1.15", // v1.34.0
        "symfony/var-dumper": "5.3.*", // v5.3.8
        "symfony/web-profiler-bundle": "5.3.*", // v5.3.8
        "zenstruck/foundry": "^1.1" // v1.13.3
    }
}