add Implements hook_help() in clean_node_api.module

clean_node_api/clean_node_api.module

@@ -2,4 +2,27 @@
 
 /**
  * @file
++ * Clean restful api.
  */
+
+use Drupal\Core\Routing\RouteMatchInterface;
+
+/**
+ * Implements hook_help().
+ *
+ * @param $route_name
+ * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+ *
+ * @return string
+ *  Return in string
+ */
+function clean_node_api_help($route_name, RouteMatchInterface $route_match) {
+    switch ($route_name) {
+      // Main module help for the ctc module.
+      case 'help.page.clean_node_api':
+            $output = '';
+            $output .= '<h3>' . t('About') . '</h3>';
+            $output .= '<p>' . t('Clean RESTful Web Services API is just alternative for default drupal APIs that is not clean.') . '</p>';
+            return $output;
+  }
+}