Failed to authenticate on SMTP server with username "admin@p2code.com" using 2 possible authenticators

Failed to authenticate on SMTP server with username "admin@p2code.com" using 2 possible authenticators

i cant send email by yii 2
my config
  2. 'mailer' => [
  3.             'class' => 'yii\swiftmailer\Mailer',
  4.             'viewPath' => '@common/mail',
  5.             'transport' => [
  6. 'class' => 'Swift_SmtpTransport',
  7. 'host' => 'smtp.zoho.com', 
  8. 'username' => 'admin@p2code.com', 
  9. 'password' => '***...',
  10. 'port' => '587',
  11. 'encryption' => 'tls',
  12. ],
  13.         ],
=> error :Failed to authenticate on SMTP server with username " admin@p2code.com" using 2 possible authenticators
please help me, thanks.