Modifiquem a tabela de usuários

• id (not null, unique, primary key, serial)
• name (varchar(255), not null)
• username (varchar(255), not null, unique)
• password (varchar(255), not null)
• email (varchar(255), not null, unique)
• created_at (timestamp, not null)
• updated_at (timestamp)
• description (text)
• institution (text)
• birthday (timestamp, not null)
• cpf (varchar(255), not null)
• confirmed_at (timestamp)
• confirmation_sent_at (timestamp)
• deleted_at (timestamp)
• active (bool)
• reactivated_at (timestamp)