text: CREATE TABLE users_scheme.users (
     username varchar(50) NOT NULL,
     password varchar(70) NOT NULL,
     enabled boolean NOT NULL DEFAULT FALSE,
     primary key(username)
  );
  
  create table users_scheme.user_roles(
    user_role_id SERIAL PRIMARY KEY,
    username varchar(50) NOT NULL,
    authority varchar(50) NOT NULL,
    UNIQUE (username,authority),
    FOREIGN KEY (username) REFERENCES users_scheme.users (username)
  );
  