title: Get the user's key from the firebase database
body: <p>I have users data stored in the database</p>
  
  <pre><code>users: {
    -Kp56mwwpFiCwIXLszqu: {
       email: "testemail@gmail.com",
       name: "test name",
       username: "testname"
    },
    -Kp58X2WGUVNazSSbRqF: {
       email: "anotheruser@gmail.com",
       name: "another user",
       username: "anotheruser"
    }
  }
  </code></pre>
  
  <p>Is there a way to get the user's key e.g. <code>-Kp56mwwpFiCwIXLszqu</code> or <code>-Kp58X2WGUVNazSSbRqF</code>. </p>
  
  <p>I want to add more collections to the existing users. For eg. I am logged in as a <code>testname</code> and I want to get the <code>testname</code> key from the database, so that I can push more collections there.</p>
  
  <p>Any help is appreciated. Thank you</p>