Laravel 6.4.1 SQLSTATE[HY000] [2002] Connection refused
Open localhost/phpmyadmin and find a tab called User accounts.
Find the root user and set its password in your .env and also don't forget to create the database named laravel if it doesn't exist
Then you can clear config cache
php artisan config:clearAnd migrate
php artisan migrate
I've come across this Error too by building up a new project with Laravel running in docker-compose for development.
My solution was to compare the prebuild .env-File with the actual credentials I used for building the database container.Especially I was using DB_HOST=127.0.0.1 instead of the correct service name of my docker-compose setup: DB_HOST=mysql