title: Firebase gets invalid email error message
body: <p>I get this error after creating user and tried to send verification email always get this error for invalid email, while the email is registered and valid.</p>
  
  <blockquote>
    <p>Optional(Error Domain=FIRAuthErrorDomain Code=17008 "Missing sender" UserInfo={NSLocalizedDescription=Missing sender, error_name=ERROR_INVALID_EMAIL})</p>
  </blockquote>
  
  <pre><code>Auth.auth().currentUser?.sendEmailVerification(completion: { (error) in
      if error != nil {
          print(error.debugDescription)
  
          let alert = UIAlertController(title: NSLocalizedString("Error", comment: "Error"), message: NSLocalizedString("Unable to send verification, Please check provided email and try again.", comment: "Unable to send verification, Please check provided email and try again."), preferredStyle: .actionSheet)
          alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { _ in
          }))
          self.present(alert, animated: true, completion: nil)
          AppDelegate.instance().dismissActivityIndicatos()
          return
      }
  </code></pre>
  
  <p>Thanks for your help</p>