Docker image used: https://hub.docker.com/_/mysql/?tab=description
docker command used: docker run -d -p 3306:3306 -e MYSQL_USER=mysqladmin -e MYSQL_PASSWORD=Notallowed1! -e MYSQL_DATABASE=testdb -e MYSQL_ROOT_PASSWORD=password mysql:latest
with root\password getting this error "Unable to load authentication plugin 'caching_sha2_password'"
With "adminuser\Notallowed1!" Access denied for user 'adminuser'@'192.168.99.1' (using password: YES)
Connection properties: allowPublicKeyRetrieval=true useSSL=false and true both tried
Hello this seems to be a problem with your MySQL client, not the database itself.
Can you tell us which client you are using?
Have you tried to connect with another SQL client? (PHP/ mariadb-client, DataGrip etc?)