CREATE SCHEMA account;

CREATE TABLE account.user
SELECT 'proxy' mysql_user, 'test-user' user, '1234' password;
-- SELECT mysql_user FROM user WHERE user = #user AND password = #pass

CREATE USER ''@'%' IDENTIFIED WITH proxy_auth;
GRANT USAGE ON *.* TO ''@'%';

CREATE USER 'proxy'@'%' IDENTIFIED BY '123456';
GRANT USAGE ON *.* TO 'proxy'@'%';
GRANT PROXY ON 'proxy'@'%' TO ''@'%';