diff --git a/AutobusApi.Domain/Entities/Address.cs b/AutobusApi.Domain/Entities/Address.cs
index f2594c1..0e7fbdf 100644
--- a/AutobusApi.Domain/Entities/Address.cs
+++ b/AutobusApi.Domain/Entities/Address.cs
@@ -6,15 +6,15 @@ namespace AutobusApi.Domain.Entities;
 
 public class Address : EntityBase
 {
-    public required string Name { get; set; }
+    public string Name { get; set; } = null!;
 
-    public required ICoordinates Location { get; set; }
+    public ICoordinates Location { get; set; } = null!;
 
-    public required VehicleType VehicleType { get; set; }
+    public VehicleType VehicleType { get; set; }
 
     public ICollection<RouteAddress> RouteAddresses { get; set; } = null!;
 
-    public required int CityId { get; set; }
+    public int CityId { get; set; }
 
     public City City { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/Aircraft.cs b/AutobusApi.Domain/Entities/Aircraft.cs
index 5148393..520dd59 100644
--- a/AutobusApi.Domain/Entities/Aircraft.cs
+++ b/AutobusApi.Domain/Entities/Aircraft.cs
@@ -4,13 +4,13 @@ public class Aircraft : Vehicle
 {
     public Vehicle Vehicle { get; set; } = null!;
 
-    public required string Number { get; set; }
+    public string Number { get; set; } = null!;
 
-    public required string Model { get; set; }
+    public string Model { get; set; } = null!;
 
-    public required int Capacity { get; set; }
+    public int Capacity { get; set; }
 
-    public required bool HasWiFi { get; set; }
+    public bool HasWiFi { get; set; }
 
-    public required bool HasMultimedia { get; set; }
+    public bool HasMultimedia { get; set; }
 }
diff --git a/AutobusApi.Domain/Entities/Bus.cs b/AutobusApi.Domain/Entities/Bus.cs
index 3538c26..7075469 100644
--- a/AutobusApi.Domain/Entities/Bus.cs
+++ b/AutobusApi.Domain/Entities/Bus.cs
@@ -4,19 +4,19 @@ public class Bus : Vehicle
 {
     public Vehicle Vehicle { get; set; } = null!;
 
-    public required string Number { get; set; }
+    public string Number { get; set; } = null!;
 
-    public required string Model { get; set; }
+    public string Model { get; set; } = null!;
 
-    public required int Capacity { get; set; }
+    public int Capacity { get; set; }
 
-    public required bool HasClimateControl { get; set; }
+    public bool HasClimateControl { get; set; }
 
-    public required bool HasWC { get; set; }
+    public bool HasWC { get; set; }
 
-    public required bool HasWiFi { get; set; }
+    public bool HasWiFi { get; set; }
 
-    public required bool HasMultimedia { get; set; }
+    public bool HasMultimedia { get; set; }
 
-    public required bool HasOutlets { get; set; }
+    public bool HasOutlets { get; set; }
 }
diff --git a/AutobusApi.Domain/Entities/Carriage.cs b/AutobusApi.Domain/Entities/Carriage.cs
index d737a48..e1d1dcc 100644
--- a/AutobusApi.Domain/Entities/Carriage.cs
+++ b/AutobusApi.Domain/Entities/Carriage.cs
@@ -5,15 +5,15 @@ namespace AutobusApi.Domain.Entities;
 
 public class Carriage : EntityBase
 {
-    public required CarriageType Type { get; set; }
+    public CarriageType Type { get; set; }
 
-    public required int Capacity { get; set; }
+    public int Capacity { get; set; }
 
-    public required int Number { get; set; }
+    public int Number { get; set; }
 
-    public required bool HasWiFi { get; set; }
+    public bool HasWiFi { get; set; }
 
-    public required bool HasOutlets { get; set; }
+    public bool HasOutlets { get; set; }
 
     public ICollection<TrainCarriage> TrainCarriage { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/City.cs b/AutobusApi.Domain/Entities/City.cs
index ac50496..c7d5bb6 100644
--- a/AutobusApi.Domain/Entities/City.cs
+++ b/AutobusApi.Domain/Entities/City.cs
@@ -4,11 +4,11 @@ namespace AutobusApi.Domain.Entities;
 
 public class City : EntityBase
 {
-    public required string Name { get; set; }
+    public string Name { get; set; } = null!;
 
     public ICollection<Address> Addresses { get; set; } = null!;
 
-    public required int RegionId { get; set; }
+    public int RegionId { get; set; }
 
     public Region Region { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/Company.cs b/AutobusApi.Domain/Entities/Company.cs
index 1ff4d97..3623f04 100644
--- a/AutobusApi.Domain/Entities/Company.cs
+++ b/AutobusApi.Domain/Entities/Company.cs
@@ -4,13 +4,13 @@ namespace AutobusApi.Domain.Entities;
 
 public class Company : EntityBase
 {
-    public required string Name { get; set; }
+    public string Name { get; set; } = null!;
 
-    public required string LegalAddress { get; set; }
+    public string LegalAddress { get; set; } = null!;
 
-    public required string ContactEmail { get; set; }
+    public string ContactEmail { get; set; } = null!;
 
-    public required string ContactPhoneNumber { get; set; }
+    public string ContactPhoneNumber { get; set; } = null!;
 
     public ICollection<Vehicle> Vehicles { get; set; } = null!;
 
diff --git a/AutobusApi.Domain/Entities/Country.cs b/AutobusApi.Domain/Entities/Country.cs
index ddb860e..2b320cf 100644
--- a/AutobusApi.Domain/Entities/Country.cs
+++ b/AutobusApi.Domain/Entities/Country.cs
@@ -4,7 +4,7 @@ namespace AutobusApi.Domain.Entities;
 
 public class Country : EntityBase
 {
-    public required string Name { get; set; }
+    public string Name { get; set; } = null!;
 
     public ICollection<Region> Regions { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/Employee.cs b/AutobusApi.Domain/Entities/Employee.cs
index 6e32101..e2f738e 100644
--- a/AutobusApi.Domain/Entities/Employee.cs
+++ b/AutobusApi.Domain/Entities/Employee.cs
@@ -5,17 +5,19 @@ namespace AutobusApi.Domain.Entities;
 
 public class Employee : EntityBase
 {
-    public required string FisrtName { get; set; }
+    public string FisrtName { get; set; } = null!;
 
-    public required string LastName { get; set; }
+    public string LastName { get; set; } = null!;
 
-    public required string Patronymic { get; set; }
+    public string Patronymic { get; set; } = null!;
 
-    public required Sex Sex { get; set; }
+    public Sex Sex { get; set; }
 
-    public required DateOnly BirthDate { get; set; }
+    public DateOnly BirthDate { get; set; }
 
-    public required int EmployerCompanyId { get; set; }
+    public int IdentityId { get; set; }
+
+    public int EmployerCompanyId { get; set; }
 
     public Company EmployerCompany { get; set; } = null!;
 
diff --git a/AutobusApi.Domain/Entities/EmployeeDocument.cs b/AutobusApi.Domain/Entities/EmployeeDocument.cs
index 2fda8e5..d5c50dd 100644
--- a/AutobusApi.Domain/Entities/EmployeeDocument.cs
+++ b/AutobusApi.Domain/Entities/EmployeeDocument.cs
@@ -5,11 +5,11 @@ namespace AutobusApi.Domain.Entities;
 
 public class EmployeeDocument : EntityBase
 {
-    public required EmployeeDocumentType Type { get; set; }
+    public EmployeeDocumentType Type { get; set; }
 
-    public required string Information { get; set; }
+    public string Information { get; set; } = null!;
 
-    public required int EmployeeId { get; set; }
+    public int EmployeeId { get; set; }
 
     public Employee Employee { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/Region.cs b/AutobusApi.Domain/Entities/Region.cs
index 6fc3d39..b0d7ed1 100644
--- a/AutobusApi.Domain/Entities/Region.cs
+++ b/AutobusApi.Domain/Entities/Region.cs
@@ -4,11 +4,11 @@ namespace AutobusApi.Domain.Entities;
 
 public class Region : EntityBase
 {
-    public required string Name { get; set; }
+    public string Name { get; set; } = null!;
 
     public ICollection<City> Cities { get; set; } = null!;
 
-    public required int CountryId { get; set; }
+    public int CountryId { get; set; }
 
     public Country Country { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/Review.cs b/AutobusApi.Domain/Entities/Review.cs
index 485eace..4fa27c2 100644
--- a/AutobusApi.Domain/Entities/Review.cs
+++ b/AutobusApi.Domain/Entities/Review.cs
@@ -4,17 +4,17 @@ namespace AutobusApi.Domain.Entities;
 
 public class Review : EntityBase
 {
-    public required int Rating { get; set; }
+    public int Rating { get; set; }
 
-    public required string? Comment { get; set; }
+    public string? Comment { get; set; }
 
-    public required DateTime PostDateTimeUtc { get; set; }
+    public DateTime PostDateTimeUtc { get; set; }
 
-    public required int UserId { get; set; }
+    public int UserId { get; set; }
 
     public User User { get; set; } = null!;
 
-    public required int VehicleEnrollmentId { get; set; }
+    public int VehicleEnrollmentId { get; set; }
 
     public VehicleEnrollment VehicleEnrollment { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/RouteAddress.cs b/AutobusApi.Domain/Entities/RouteAddress.cs
index 50b3bbe..344069f 100644
--- a/AutobusApi.Domain/Entities/RouteAddress.cs
+++ b/AutobusApi.Domain/Entities/RouteAddress.cs
@@ -4,13 +4,13 @@ namespace AutobusApi.Domain.Entities;
 
 public class RouteAddress : EntityBase
 {
-    public required int Order { get; set; }
+    public int Order { get; set; }
 
-    public required int AddressId { get; set; }
+    public int AddressId { get; set; }
 
     public Address Address { get; set; } = null!;
 
-    public required int RouteId { get; set; }
+    public int RouteId { get; set; }
 
     public Route Route { get; set; } = null!;
 
diff --git a/AutobusApi.Domain/Entities/RouteAddressDetails.cs b/AutobusApi.Domain/Entities/RouteAddressDetails.cs
index bcc73a8..49ba4ab 100644
--- a/AutobusApi.Domain/Entities/RouteAddressDetails.cs
+++ b/AutobusApi.Domain/Entities/RouteAddressDetails.cs
@@ -4,17 +4,17 @@ namespace AutobusApi.Domain.Entities;
 
 public class RouteAddressDetails : EntityBase
 {
-    public required TimeSpan TimeToNextAddress { get; set; }
+    public TimeSpan TimeToNextAddress { get; set; }
 
-    public required double CostToNextAddress { get; set; }
+    public double CostToNextAddress { get; set; }
 
-    public required TimeSpan CurrentAddressStopTime { get; set; }
+    public TimeSpan CurrentAddressStopTime { get; set; }
 
-    public required int RouteAddressId { get; set; }
+    public int RouteAddressId { get; set; }
 
     public RouteAddress RouteAddress { get; set; } = null!;
 
-    public required int VehicleEnrollmentId { get; set; }
+    public int VehicleEnrollmentId { get; set; }
 
     public VehicleEnrollment VehicleEnrollment { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/Ticket.cs b/AutobusApi.Domain/Entities/Ticket.cs
index 03e7017..0c09e71 100644
--- a/AutobusApi.Domain/Entities/Ticket.cs
+++ b/AutobusApi.Domain/Entities/Ticket.cs
@@ -4,11 +4,11 @@ namespace AutobusApi.Domain.Entities;
 
 public class Ticket : EntityBase
 {
-    public required int TicketGroupId { get; set; }
+    public int TicketGroupId { get; set; }
 
     public TicketGroup TicketGroup { get; set; } = null!;
 
-    public required int VehicleEnrollmentId { get; set; }
+    public int VehicleEnrollmentId { get; set; }
 
     public VehicleEnrollment VehicleEnrollment { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/TicketDocument.cs b/AutobusApi.Domain/Entities/TicketDocument.cs
index 9500602..f1c4bbf 100644
--- a/AutobusApi.Domain/Entities/TicketDocument.cs
+++ b/AutobusApi.Domain/Entities/TicketDocument.cs
@@ -5,11 +5,11 @@ namespace AutobusApi.Domain.Entities;
 
 public class TicketDocument : EntityBase
 {
-    public required TicketDocumentType Type { get; set; }
+    public TicketDocumentType Type { get; set; }
 
-    public required string Information { get; set; }
+    public string Information { get; set; } = null!;
 
-    public required int TicketGroupId { get; set; }
+    public int TicketGroupId { get; set; }
 
     public TicketGroup TicketGroup { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/TicketGroup.cs b/AutobusApi.Domain/Entities/TicketGroup.cs
index 00125b6..71cf18b 100644
--- a/AutobusApi.Domain/Entities/TicketGroup.cs
+++ b/AutobusApi.Domain/Entities/TicketGroup.cs
@@ -5,33 +5,33 @@ namespace AutobusApi.Domain.Entities;
 
 public class TicketGroup : EntityBase
 {
-    public required string BuyerFirstName { get; set; }
+    public string BuyerFirstName { get; set; } = null!;
 
-    public required string BuyerLastName { get; set; }
+    public string BuyerLastName { get; set; } = null!;
 
-    public required string BuyerPhoneNumber { get; set; }
+    public string BuyerPhoneNumber { get; set; } = null!;
 
-    public required string BuyerEmailAddress { get; set; }
+    public string BuyerEmailAddress { get; set; } = null!;
 
-    public required string PassengerFirstName { get; set; }
+    public string PassengerFirstName { get; set; } = null!;
 
-    public required string PassengerLastName { get; set; }
+    public string PassengerLastName { get; set; } = null!;
 
-    public required string PassengerPatronymic { get; set; }
+    public string PassengerPatronymic { get; set; } = null!;
 
-    public required Sex PassengerSex { get; set; }
+    public Sex PassengerSex { get; set; }
 
-    public required DateOnly PassengerBirthDate { get; set; }
+    public DateOnly PassengerBirthDate { get; set; }
 
-    public required DateTime PurchaseDateTimeUtc { get; set; }
+    public DateTime PurchaseDateTimeUtc { get; set; }
 
-    public required bool IsReturned { get; set; }
+    public bool IsReturned { get; set; }
 
     public int? UserId { get; set; }
 
     public User? User { get; set; }
 
-    public required int TicketDocumentId { get; set; }
+    public int TicketDocumentId { get; set; }
 
     public TicketDocument TicketDocument { get; set; } = null!;
 
diff --git a/AutobusApi.Domain/Entities/Train.cs b/AutobusApi.Domain/Entities/Train.cs
index f3a07ec..427dc01 100644
--- a/AutobusApi.Domain/Entities/Train.cs
+++ b/AutobusApi.Domain/Entities/Train.cs
@@ -4,7 +4,7 @@ public class Train : Vehicle
 {
     public Vehicle Vehicle { get; set; } = null!;
 
-    public required string Number { get; set; }
+    public string Number { get; set; } = null!;
 
     public ICollection<TrainCarriage> TrainCarriage { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/TrainCarriage.cs b/AutobusApi.Domain/Entities/TrainCarriage.cs
index cc41180..a33fd83 100644
--- a/AutobusApi.Domain/Entities/TrainCarriage.cs
+++ b/AutobusApi.Domain/Entities/TrainCarriage.cs
@@ -4,11 +4,11 @@ namespace AutobusApi.Domain.Entities;
 
 public class TrainCarriage : EntityBase
 {
-    public required int TrainId { get; set; }
+    public int TrainId { get; set; }
 
     public Train Train { get; set; } = null!;
 
-    public required int CarriageId { get; set; }
+    public int CarriageId { get; set; }
 
     public Carriage Carriage { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Entities/User.cs b/AutobusApi.Domain/Entities/User.cs
index 858f56f..9b13e29 100644
--- a/AutobusApi.Domain/Entities/User.cs
+++ b/AutobusApi.Domain/Entities/User.cs
@@ -4,6 +4,8 @@ namespace AutobusApi.Domain.Entities;
 
 public class User : EntityBase
 {
+    public int IdentityId { get; set; }
+
     public ICollection<TicketGroup> TicketGroups { get; set; } = null!;
 
     public ICollection<Review> Reviews { get; set; } = null!;
diff --git a/AutobusApi.Domain/Entities/Vehicle.cs b/AutobusApi.Domain/Entities/Vehicle.cs
index 3bd58ac..ced2b19 100644
--- a/AutobusApi.Domain/Entities/Vehicle.cs
+++ b/AutobusApi.Domain/Entities/Vehicle.cs
@@ -4,7 +4,7 @@ namespace AutobusApi.Domain.Entities;
 
 public class Vehicle : EntityBase
 {
-    public required int CompanyId { get; set; }
+    public int CompanyId { get; set; }
 
     public Company Company { get; set; } = null!;
 
diff --git a/AutobusApi.Domain/Entities/VehicleEnrollment.cs b/AutobusApi.Domain/Entities/VehicleEnrollment.cs
index ebf9c71..895e8cd 100644
--- a/AutobusApi.Domain/Entities/VehicleEnrollment.cs
+++ b/AutobusApi.Domain/Entities/VehicleEnrollment.cs
@@ -4,13 +4,13 @@ namespace AutobusApi.Domain.Entities;
 
 public class VehicleEnrollment : EntityBase
 {
-    public required DateTime DepartureDateTimeUtc { get; set; }
+    public DateTime DepartureDateTimeUtc { get; set; }
 
-    public required int VehicleId { get; set; }
+    public int VehicleId { get; set; }
 
     public Vehicle Vehicle { get; set; } = null!;
 
-    public required int RouteId { get; set; }
+    public int RouteId { get; set; }
 
     public Route Route { get; set; } = null!;
 
diff --git a/AutobusApi.Domain/Entities/VehicleEnrollmentEmployee.cs b/AutobusApi.Domain/Entities/VehicleEnrollmentEmployee.cs
index 10271b7..a135a0a 100644
--- a/AutobusApi.Domain/Entities/VehicleEnrollmentEmployee.cs
+++ b/AutobusApi.Domain/Entities/VehicleEnrollmentEmployee.cs
@@ -4,11 +4,11 @@ namespace AutobusApi.Domain.Entities;
 
 public class VehicleEnrollmentEmployee : EntityBase
 {
-    public required int EmployeeId { get; set; }
+    public int EmployeeId { get; set; }
 
     public Employee Employee { get; set; } = null!;
 
-    public required int VehicleEnrollmentId { get; set; }
+    public int VehicleEnrollmentId { get; set; }
 
     public VehicleEnrollment VehicleEnrollment { get; set; } = null!;
 }
diff --git a/AutobusApi.Domain/Enums/IdentityRoles.cs b/AutobusApi.Domain/Enums/IdentityRoles.cs
new file mode 100644
index 0000000..b5ddb1b
--- /dev/null
+++ b/AutobusApi.Domain/Enums/IdentityRoles.cs
@@ -0,0 +1,6 @@
+namespace AutobusApi.Domain.Enums;
+
+public enum IdentityRoles
+{
+    User = 0
+}