text: create table if not exists landlord.external_api_user
  (
      id          bigint       not null,
      customer_id bigint       not null,
      created     timestamp    not null,
      updated     timestamp    not null,
      username    varchar(255) not null,
      constraint external_api_user_pky primary key (id),
      constraint fk_external_api_user_customer foreign key (customer_id) references landlord.customer (id) match simple
          on update cascade on DELETE cascade
  );
  
  create index if not exists fki_external_api_user_customer on landlord.external_api_user(customer_id);