title: How to add a where condition based on context in a Postgraphile plugin?
body: <p>I'm evaluating Postgraphile for a small experiment and was trying to add an implicit where condition to the generated SQL query for all the query operations based on the resolver context (for example, something like, <code>where(user_id = context.user_id)</code>.</p>
  <p>I tried searching docs for a way to access <code>queryBuilder</code> in a resolver so I can do something like</p>
  <pre class="lang-js prettyprint-override"><code>queryBuilder.where(sql.query`user_id = ${sql.value(context.user_id)}`);
  </code></pre>
  <p>but I did not find a way after searching for a lot of time. I'm sure there's a way - I just couldn't find it. Can anyone just point me in the right direction or just paste a link to the documentation? Thanks!</p>
  <p>I already know that we can use RLS policy to add this condition but I have a complex where condition based on business logic that'd I'd like to write in Node.js</p>