Launch the MySQL monitor:

mysql -u root -p

Create the database for Schema Registry and SAM metastore:

create database registry;
create database streamline;

Create Schema Registry and SAM user accounts, replacing the final IDENTIFIED BY string with your password:

CREATE USER 'registry'@'%' IDENTIFIED BY 'R12$%34qw';
CREATE USER 'streamline'@'%' IDENTIFIED BY 'R12$%34qw';

Assign privileges to the user account:

GRANT ALL PRIVILEGES ON registry.* TO 'registry'@'%' WITH GRANT OPTION ;
GRANT ALL PRIVILEGES ON streamline.* TO 'streamline'@'%' WITH GRANT OPTION ;

Commit the operation:

commit;