• Registering a new matrix user
• Access postgresql database

Registering a new matrix user

# Help command
$ docker exec -it matrixdotorg-synapse register_new_matrix_user --help

# Registering a new user
$ docker exec -it matrixdotorg-synapse register_new_matrix_user -u ${USERNAME} -c /data/homserver.yaml

Access postgresql database

docker run -it --rm --network postgresql-network postgres psql -h postgresql -U postgres