Mysqldump 8.0.23 mysqldump error

[Christos Petritzis]

Hi! I have an Ubuntu Web Server with latest version 20.04. My mysql version is also the latest 8.0.23. I have a problem with auto mysqldump.
My Backup user has those privilleges: SELECT, TRIGGER, SHOW VIEW, LOCK TABLES and PROCESS
This procedure worked for me until Mysql 5.7 version.
First i run this commant : mysql_config_editor set --login-path=local --host=localhost --user=username --password to make the .mylogin.cnf
and after that i run mysqldump --login-path=local my_database | gzip > db_backup.tar.gz
Either as root either as backup user i have this error: ERROR 1045 (28000): Access denied for user 'myuser'@'localhost' (using password: YES)

P.S. when i'm trying with root user i reproduced again the .mylogin.cnf file with correct credentials.

Thank you Very Much