failed to authenticate on SMTP server with username using 2 possible authenticators (even using same username)

We have 2 nginx web server and using AWS SES email service to send notification email in Laravel 5.5.But i got this issue in one server and i checked all smtp config are correct. This username works in other server. Both web server configuration are same and correct. I have no idea why happened this error. Anyone can help me to solve this problem as soon as possible.

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