1st step
on 2nd node:
$ echo "DROP SUBSCRIPTION exampledb_node_2" | psql
on 1st node:
$ echo "DROP PUBLICATION exampledb_node_1" | psql
2nd step
on 1st node:
$ echo -e "DROP DATABASE exampledb \n" | psql
$ echo "DROP USER \"user-example\"" | psql
on 2nd node:
$ echo -e "DROP DATABASE exampledb \n" | psql
$ echo "DROP USER \"user-example\"" | psql