Script to create db.

contrib/mariadb-create-database.sql

+CREATE DATABASE aura_engine CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+CREATE USER 'aura_engine'@'localhost' IDENTIFIED BY '1234';
+GRANT ALL PRIVILEGES ON aura_engine.* TO 'aura_engine'@'localhost';
+FLUSH PRIVILEGES;
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