pan class="token operator">:</span> Map<span class="token punctuation">[</span><span class="token builtin">String</span><span class="token punctuation">,</span> AttributeValue<span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token punctuation">{</span>
    mainKey<span class="token punctuation">.</span>bind<span class="token punctuation">(</span>userId<span class="token punctuation">.</span>value<span class="token punctuation">)</span>
  <span class="token punctuati