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

        try {
            $activeVersion = $this->getRequest()->getParam('active_version');
            $dictionary = $this->api->getSingleDictionary($activeVersion, Config::AUTH_DICTIONARY_NAME);
            $vclPath = Config::VCL_AUTH_SNIPPET_PATH;
            $snippets = $this->config->getVclSnippets($vclPath);

            // Check if snippets exist
            $status = true;
            foreach ($snippets as $key => $value) {
                $name = Config::FASTLY_MAGENTO_MODULE.'_basic_auth_'.$key;
                $status = $this->api->getSnippet($activeVersion, $name);

                if (!$status) {
                    break;
                }
            }

            if ((is_array($dictionary) && empty($dictionary)) || !isset($dictionary->id)) {
                return $result->setData([
                    'status'    => 'empty',
                    'msg'       => 'Authentication dictionary does not exist.'
                ]);
            }

            // Check if there are any entries left
            $authItems = $this->api->dictionaryItemsList($dictionary->id);

            if (($status == true && is_array($authItems) && count($authItems) < 2) || $authItems == false) {
                // No users left, send message
                return $result->setData([
                    'status'    => 'empty',
                    'msg'       => 'While Basic Authentication is enabled, at least one user must exist.',
                ]);
            }

            $itemKey = $this->getRequest()->getParam('item_key_id');
            $deleteItem = $this->api->deleteDictionaryItem($dictionary->id, $itemKey);

            if (!$deleteItem) {
                return $result->setData([
                    'status'    => false,
                    'msg'       => 'Failed to create Dictionary item.'
                ]);
            }

            return $result->setData(['status' => true]);
        } 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, Config::AUTH_DICTIONARY_NAME);
            $vclPath = Config::VCL_AUTH_SNIPPET_PATH;
            $snippets = $this->config->getVclSnippets($vclPath);

            // Check if snippets exist
            $status = true;
            foreach ($snippets as $key => $value) {
                $name = Config::FASTLY_MAGENTO_MODULE.'_basic_auth_'.$key;
                $status = $this->api->getSnippet($activeVersion, $name);

                if (!$status) {
                    break;
                }
            }

            if ((is_array($dictionary) && empty($dictionary)) || !isset($dictionary->id)) {
                return $result->setData([
                    'status'    => 'empty',
                    'msg'       => 'Authentication dictionary does not exist.'
                ]);
            }

            // Check if there are any entries left
            $authItems = $this->api->dictionaryItemsList($dictionary->id);

            if (($status == true && is_array($authItems) && count($authItems) < 2) || $authItems == false) {
                // No users left, send message
                return $result->setData([
                    'status'    => 'empty',
                    'msg'       => 'While Basic Authentication is enabled, at least one user must exist.',
                ]);
            }

            $itemKey = $this->getRequest()->getParam('item_key_id');
            $deleteItem = $this->api->deleteDictionaryItem($dictionary->id, $itemKey);

            if (!$deleteItem) {
                return $result->setData([
                    'status'    => false,
                    'msg'       => 'Failed to create Dictionary item.'
                ]);
            }

            return $result->setData(['status' => true]);
        } catch (\Exception $e) {
            return $result->setData([
                'status'    => false,
                'msg'       => $e->getMessage()
            ]);
        }
    }
Delete auth item

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