Add queryGroupSlots method

src/SlotDbClient.php

@@ -123,6 +123,19 @@ class SlotDbClient
         return $data;
     }
 
+    /**
+     * Return slots and properties from members of $groupId
+     *
+     * @param string $groupId
+     * @return array<string,mixed>
+     */
+    public function queryGroupSlots(string $groupId): array
+    {
+        $res = $this->get("/group/{$groupId}/members");
+        $data = json_decode($res->getBody(), true);
+        return $data;
+    }
+
     public function updateGroup(string $groupId, array $props): array
     {
         $res = $this->post("/group/{$groupId}", $props);