msmtp having issues authenticating

Ive been trying to follow this guide to setup msmtp but its still not working. I have the msmtprc file in both /etc/msmtprc and ~/.msmtprc with the exact same contents # Set default values for all following accounts. defaults auth on tls on tls_trust_file /etc/ssl/certs/ca-certificates.crt logfile ~/.msmtp.log # Gmail account gmail host smtp.gmail.com port 465 tls_starttls off from og@gmail.com user og@gmail.com password # Set a default account account default: gmail Ive installed msmtp-mta and s-nail however **/etc/mail.rc does NOT exist** my alias file contains a single entry > admin@momspi:~ $ cat /etc/aliases > # See man 5 aliases for format > postmaster: og@gmail.com but when i go to test it, it fails

admin@momspi:~ $ echo "hello there username." | msmtp -a default og@gmail.com
msmtp: authentication failed (method PLAIN)
msmtp: server message: 535-5.7.8 Username and Password not accepted. For more information, go to
msmtp: server message: 535 5.7.8  https://support.google.com/mail/?p=BadCredentials  s9-20020a170902c64900b001ec6bab93cdsm428323pls.15 - gsmtp
msmtp: could not send mail (account default from /home/admin/.msmtprc)