Module development and code questions

Hi, 

I added to a extra field in the CMS (Structure > Block > Tier > Managefield) Field Type is List(text) and Widget is Select List. 

After, I edited another field (Type) adding one more option (sustainability) in the field Allowed Values List (The new field only show when select the option sustainability in the field Type).

Na

I am making a form using formbuilder, and it has some ajax on it. I am having trouble trying to get values on the submit handler of the ajax field. 

I have a parent container called ['isbn'],

  $form['isbn'] = [
'#type' => 'container',
'#id' => 'isbn_search',
  ];

and inside of that are two children:

['isbn']['number'] - which is a textfield

My custom block gets multiple nodes and uses ViewBuilder to render these nodes. The node titles in this block are linked to the canonical route. That works for a default but my customer wants to link to an external link if that attribute has that value. So I'm incorporating TrustedCallbackInterface in my custom block to build a pre_render callback. But I'm getting an unexpected error:

Parameter 1 to Drupal\mymodule\Plugin\Block\MyBlock::changeUrl() expected to be a reference

Here's an excerpt of my custom block

first of all i tried to print field content as {{ kint(field) }} but it causes blank page, also {{ kint(field.content) }} renders markup output, i need to check the field name as below

{% for field in fields -%}

{% if field.name == 'field_image' %}

... do something

{% endif %}

{%- endfor %}

Hallo, scuse for my English. I need to’ login to mysite using a php script. I have trouble with the password. 
I need crypt the clear password in the encrypted to query the table users_field_data and i read that si possible through password-hash.sh but i can not understand how it’s done. Please help me ... thanks