request of applications for applicant

SchengenVisaApi/ApplicationLayer/Services/Applicants/NeededServices/IApplicantsRepository.cs

@@ -8,4 +8,7 @@ public interface IApplicantsRepository : IGenericRepository<Applicant>
 {
     /// Find <see cref="Applicant"/> by Identifier
     Task<Applicant> FindByUserIdAsync(Guid userId, CancellationToken cancellationToken);
+
+    /// Get identifier of applicant by user identifier
+    Task<Guid> GetApplicantIdByUserId(Guid userId, CancellationToken cancellationToken);
 }