Is it permissible to demand compensation for labor rights (such as annual and sick leaves and social security) that were not paid throughout the period of employment, especially after the termination of service without compensation due to the coronavirus pandemic?

"The contract is the law between the contracting parties," and labor law is considered an established custom unless the contract stipulates otherwise. Accordingly, an employee may demand their rights to sick and annual leave as stipulated in labor law, unless there is a clause in the contract that forfeits these rights. It is advisable to consult scholars of knowledge regarding these matters in detail.