title: LOOPBACK 4: Add parameters in a API call
body: <p>I am new in Loopback 4 (NodeJS) and I have a question. I am developing an API. How can indicate parameters in the body of a post request  that are not define as a model?.</p>
  
  <p>Example:</p>
  
  <pre><code>@post('/gameshits/{id}', {
      responses: {
        '200': {
          description: 'Return the number of correct answers',
        },
      },
    })
    async gamesHits(
      @param.path.string('id') id: string,
      @requestBody() answers: Array&lt;String&gt;,
    ): Promise&lt;number&gt; {
       ....
  }
  </code></pre>
  
  <p>The problem is in the requestBody()
  Its compile but in the loopback/explorer said that it can be render. The only option is create a model? how can add more parameters to send in the body of the call? (not in the url like @param do)</p>
  
  <p>Thanks.</p>