[SOLVED] Failed to authenticate on SMTP server (gsmtp) code 535

Failed to authenticate on SMTP server with username using 3 possible authenticators. Authenticator LOGIN returned Expected response code 235 but got code "535", with message "535-5.7.8 Username and Password not accepted. Learn more at 535 5.7.8 //support.google.com/mail/?p=BadCredentials r11sm6684717ilh.33 - gsmtp ". Authenticator PLAIN returned Expected response code 235 but got code "535", with message "535-5.7.8 Username and Password not accepted. Learn more at 535 5.7.8 //support.google.com/mail/?p=BadCredentials r11sm6684717ilh.33 - gsmtp ". Authenticator XOAUTH2 returned Expected response code 250 but got code "535", with message "535-5.7.8 Username and Password not accepted. Learn more at 535 5.7.8 //support.google.com/mail/?p=BadCredentials r11sm6684717ilh.33 - gsmtp ".

Authenticator LOGIN returned Expected response code 235 but got code "535"

I am getting this error while sending an email using my Laravel server, via “Gmail SMTP” (GSMTP), this is my first set up Gmail SMTP with laravel so please let me know if there is any solution? or where is the problem 

Thanks in advance