How to add password reset link to user page?
You can create a custom module for that:

modules/custom/resetpassmodule/resetpassmodule.info.yml

name: 'resetPassModule'
type: module
description: 'Reset Password link for administrators'
core: 8.x
package: 'Custom'


modules/custom/resetpassmodule/resetpassmodule.module

&lt;?php

/**
 * @file
 * Contains resetpassmodule.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Url;
use Drupal\Component\Utility\Html;

/**
 * Implements hook_help().
 */
function resetpassmodule_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the resetpassmodule module.
    case 'help.page.resetpassmodule':
      $output = '';
      $output .= '&lt;h3&gt;' . t('About') . '&lt;/h3&gt;';
      $output .= '&lt;p&gt;' . t('Reset Password link for administrators') . '&lt;/p&gt;';
      return $output;

    default:
  }
}

/**
 * Alter the user edit form
 *
 * @param $form
 * @param \Drupal\Core\Form\FormStateInterface $form_state
 * @param $form_id
 */
function resetpassmodule_form_user_form_alter(&amp;$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id){

  //Load the current user roles
  $user = \Drupal::currentUser()-&gt;getRoles();
  // Only show the reset link button if the user is administrator.
  if(in_array("administrator", $user)) {

    //Add the reset button to the form.
    $form['actions']['sendresetlink'] = [
      '#type' =&gt; 'submit',
      '#weight' =&gt; 999,
      '#limit_validation_errors' =&gt; [],
      '#button_type' =&gt; 'danger',
      '#submit' =&gt; [
        'resetpassmodule_send_reset_link_to_account_form'
      ],
      '#value' =&gt; t('Sent reset link to account email'),
    ];
  }

}

/**
 * Custom submit handler for the password reset button
 *
 * @param $form
 * @param \Drupal\Core\Form\FormStateInterface $form_state
 */
function resetpassmodule_send_reset_link_to_account_form(&amp;$form, \Drupal\Core\Form\FormStateInterface $form_state) {

  // Load the user entity of the form.
  $account = $form_state-&gt;getFormObject()-&gt;getEntity();

  // Create a timestamp.
  $timestamp = \Drupal::time()-&gt;getRequestTime();
  // Set the redirect location after the user of the one time login.
  $path = '' ;

  // Create login link from route (Copy pasted this from the drush package)
  $link = Url::fromRoute(
    'user.reset.login',
    [
      'uid' =&gt; $account-&gt;id(),
      'timestamp' =&gt; $timestamp,
      'hash' =&gt; user_pass_rehash($account, $timestamp),
    ],
    [
      'absolute' =&gt; true,
      'query' =&gt; $path ? ['destination' =&gt; $path] : [],
      'language' =&gt; \Drupal::languageManager()-&gt;getLanguage($account-&gt;getPreferredLangcode()),
    ]
  )-&gt;toString();

  // Genereate mail.
  $mailManager = \Drupal::service('plugin.manager.mail');
  $module = 'resetpassmodule';
  $key = 'user_reset_links'; // Replace with Your key
  $to = $account-&gt;getEmail();
  $langcode = \Drupal::currentUser()-&gt;getPreferredLangcode();
  $send = true;

  // Set the message and the subject.
  $params['message'] = $link;
  $params['title'] = "One time login link";

  // Send mail and collect the result.
  $result = $mailManager-&gt;mail($module, $key, $to, $langcode, $params, NULL, $send);
  if ($result['result'] != true) {
    $message = t('There was a problem sending your email notification to @email.', array('@email' =&gt; $to));
    drupal_set_message($message, 'error');
    \Drupal::logger('mail-log')-&gt;error($message);
    return;
  }

  $message = t('An email notification has been sent to @email ', array('@email' =&gt; $to));
  drupal_set_message($message);
  \Drupal::logger('mail-log')-&gt;notice($message);

}


/**
 * Implements hook_mail().
 */
function resetpassmodule_mail($key, &amp;$message, $params) {
$options = array(
  'langcode' =&gt; $message['langcode'],
);
  switch ($key) {
    case 'user_reset_links':
      $message['from'] = \Drupal::config('system.site')-&gt;get('mail');
      $message['subject'] = t('Your mail subject Here: @title', array('@title' =&gt; $params['title']), $options);
      $message['body'][] = Html::escape($params['message']);
      break;
  }
}