add user: cockroach user set amanusk --insecure
cockroach sql --insecure -e 'create database blockchain'
Grant privileges cockroach sql --insecure -e 'GRANT ALL ON DATABASE blockchain TO amanusk'
cockroach sql --format=csv -e 'SHOW TABLES FROM blockchain' --insecure | tail -n +3 | xargs -n1 printf 'DROP TABLE blockchain."%s";\n' | cockroach sql --insecure