userway-8.x-1.4/userway.install

<?php

use Drupal\Core\Database\Database;

/**
 * Implements hook_install()
 */
function userway_schema() {
  $schema['userway_data'] = [
    'description' => 'Stores module data as key/value pairs per user.',
    'fields' => [
      'uid' => [
        'description' => 'The uid this record affects.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ],
      'account' => [
        'description' => 'The identifier of the customer.',
        'type' => 'varchar_ascii',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ],
      'status' => [
        'description' => 'UserWay widget status.',
        'type' => 'int',
        'size' => 'tiny',
        'unsigned' => TRUE,
        'default' => 0,
      ],
    ],
    'primary key' => ['uid'],
  ];

  return $schema;
}

/**
 * Implements hook_uninstall()
 */
function your_custom_module_uninstall() {
  \Drupal::database()->schema()->dropTable('userway_data');
}