form-request | Form request is a package for Lumen that lets developer | Form library

I am trying to add initial data from 1 form into the second form but I cannot seem to get it work. I've tried different methods but the closest I got came from this post

Here is my code

I've looked around but I haven't been able to find a way to perform an existence check of a resource before validating an incoming request with Laravel 8 FormRequest classes.

Basically, I want to perform the following steps when, say, for example, a PUT/PATCH request comes for the update of a resource:

1. Check if the requested resource exists
2. Check if the user is authorized to make the update
3. Validate the fields of the request
4. Update the resource
5. Send the response back to the user

From what I've read, it's easy to perform steps 2 and 3 in a FormRequest while 4 and 5 could be done in a Controller (or 4 in a Service and 5 in a Controller).

What I'm missing is how to perform step 1 right at the beginning. I've seen some workarounds like How to throw a 404 in Laravel Form Request with custom Rule maybe alongside How to validate Route Parameters in Laravel 5? but I don't feel that is the proper way to achieve what I'd like to do...

With an existence check in the Controller the user gets to make a valid request first, even though he's trying to update a resource that doesn't exist (as the Framework throws a ValidationException before the Controller method can be invoked) and that doesn't sound right.

Any suggestion on how to "delay" the validation after the existence check could be achieved? Otherwise, should I discard using FormRequests altogether?

Thanks in advance!

I generated my StorePostRequest using artisan make command.
I defined rules on the rules method doing this:

In my lumen 8.0 app I want to add Resets Passwords functionality reading Trying to reset Passwords in Lumen article but I got error :

I am using Laravel 8 and validate my requests with the form request validation. However, I have a strange problem. Before I am going to describe my problem I will paste my routes and my validation class here:

routes:

I need to translate Laravel's default validation errors in JSON files. The problem is if I want to overwrite a translation, like the 'required' validation error in resourses/lang/de.json file, it doesn't work.

The reason why I have to do this is the Phrase translator system what I am using.

Any idea? Thanks!

UPDATE

After some research, now I see what is my 'problem'. Laravel using the trans() function for translating the validation errors but if you want to use Laravel's JSON translation then you have to use the __() function. Okey, I know why they are doing in that way, because the validation errors are structured by 'short keys' and the JSON formatted translation if for use strings as keys. But what if I still want to translate the default errors in the JSONish (I know it's a futuristic word) way? Follow my solution here:

First of all you have to create a form request (https://laravel.com/docs/7.x/validation#creating-form-requests):

Description

I have a little user/role management system and want the admin to be able to change passwords and names of the users. So far it works with this code in the UsersController: