Controller/Adminhtml/FastlyCdn/BasicAuthentication/Item/ListAll.php
public function execute()
    {
        $result = $this->resultJson->create();

        try {
            $activeVersion = $this->getRequest()->getParam('active_version');
            $dictionary = $this->api->getSingleDictionary($activeVersion, 'magentomodule_basic_auth');

            // Fetch Authentication items
            if (!$dictionary || (is_array($dictionary) && empty($dictionary))) {
                return $result->setData([
                    'status'    => 'none',
                    'msg'       => 'Authentication dictionary does not exist.'
                ]);
            }

            $authItems = false;

            if (isset($dictionary->id)) {
                $authItems = $this->api->dictionaryItemsList($dictionary->id);
            }

            if (is_array($authItems) && empty($authItems)) {
                return $result->setData([
                    'status'    => 'empty',
                    'msg'       => 'There are no dictionary items.'
                ]);
            }

            if (!$authItems) {
                return $result->setData([
                    'status'    => false,
                    'msg'       => 'Failed to fetch dictionary items.'
                ]);
            }

            foreach ($authItems as $key => $item) {
                $userData = explode(':', base64_decode($item->item_key)); // @codingStandardsIgnoreLine - used for authentication
                $username = $userData[0];
                $item->item_key_id = $item->item_key;
                $item->item_key = $username;
                $authItems[$key] = $item;
            }

            return $result->setData([
                'status'    => true,
                'auths'     => $authItems
            ]);
        } catch (\Exception $e) {
            return $result->setData([
                'status'    => false,
                'msg'       => $e->getMessage()
            ]);
        }
    }
public function execute()
    {
        $result = $this->resultJson->create();

        try {
            $activeVersion = $this->getRequest()->getParam('active_version');
            $dictionary = $this->api->getSingleDictionary($activeVersion, 'magentomodule_basic_auth');

            // Fetch Authentication items
            if (!$dictionary || (is_array($dictionary) && empty($dictionary))) {
                return $result->setData([
                    'status'    => 'none',
                    'msg'       => 'Authentication dictionary does not exist.'
                ]);
            }

            $authItems = false;

            if (isset($dictionary->id)) {
                $authItems = $this->api->dictionaryItemsList($dictionary->id);
            }

            if (is_array($authItems) && empty($authItems)) {
                return $result->setData([
                    'status'    => 'empty',
                    'msg'       => 'There are no dictionary items.'
                ]);
            }

            if (!$authItems) {
                return $result->setData([
                    'status'    => false,
                    'msg'       => 'Failed to fetch dictionary items.'
                ]);
            }

            foreach ($authItems as $key => $item) {
                $userData = explode(':', base64_decode($item->item_key)); // @codingStandardsIgnoreLine - used for authentication
                $username = $userData[0];
                $item->item_key_id = $item->item_key;
                $item->item_key = $username;
                $authItems[$key] = $item;
            }

            return $result->setData([
                'status'    => true,
                'auths'     => $authItems
            ]);
        } catch (\Exception $e) {
            return $result->setData([
                'status'    => false,
                'msg'       => $e->getMessage()
            ]);
        }
    }
Get all Auth items for active version

@return $this|\Magento\Framework\App\ResponseInterface|\Magento\Framework\Controller\ResultInterface