title: Im Trying To Assign User Id In Flutter Use Map Funcuin
body: <p>Im Trying To Assign User Id  In Flutter Use Map Funcuin</p>
  <pre><code>Get Error 
  </code></pre>
  <p><a href="https://i.stack.imgur.com/tuyrt.png" rel="nofollow noreferrer">https://i.stack.imgur.com/tuyrt.png</a></p>