[email protected][email protected]/node_modules/sequelize/lib/associations/mixin.js:93
      throw new Error(`${source.name}.${_.lowerFirst(Type.name)} called with something that's not a subclass of Sequelize.Model`);

brew install postgresql
psql postgres

create user "demo";
create database "typescript-orm-sequelize-postgresql-demo";
alter user "demo" with encrypted password '123456';
grant all privileges on database "typescript-orm-sequelize-postgresql-demo" to "demo";