The email needs to be valid (containing the <code>@</code> character)
The username needs to contain only alphanumeric characters (accents are not allowed) and the following characters: <code>_</code>, <code>@</code>, <code>-</code>
The username needs to contain only alphanumeric characters (accents are not allowed) and the following characters: <code>_</code>, <code>@</code>, <code>-</code>