Invalid Firebase path: .com. Firebase paths must not contain '.', '#', '$', '[', or ']'
<p>I'm going to save the email and password in a Firebase database, but unfortunately I got this error. </p>

<pre><code>Invalid Firebase path: .com. Firebase paths must not contain '.', '#', '$', '[', or ']'
</code></pre>

<p><a href="https://i.stack.imgur.com/fSPE5.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/fSPE5.jpg" alt="enter image description here"></a> </p>