Вытащил солюшен на уровень выше, чтобы прощё было дотнетить

VisaApiTests/Fakers/Auth/AuthDataFaker.cs

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+using ApplicationLayer.Services.AuthServices.Common;
+using Bogus;
+
+namespace VisaApi.Fakers.Auth;
+
+public sealed class AuthDataFaker : Faker<AuthData>
+{
+    public AuthDataFaker()
+    {
+            RuleFor(a => a.Email, f => f.Internet.Email());
+
+            RuleFor(a => a.Password, f => f.Internet.Password());
+        }
+}

VisaApiTests/Fakers/Auth/RegisterApplicantRequestFaker.cs

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+using ApplicationLayer.InfrastructureServicesInterfaces;
+using ApplicationLayer.Services.AuthServices.Requests;
+using Bogus;
+using Domains.ApplicantDomain;
+using VisaApi.Fakers.Applicants.Requests;
+
+namespace VisaApi.Fakers.Auth
+{
+    public sealed class RegisterApplicantRequestFaker : Faker<RegisterApplicantRequest>
+    {
+        private readonly NameModelFaker nameModelFaker = new();
+        private readonly PassportModelFaker passportModelFaker = new();
+        private readonly PlaceOfWorkModelFaker placeOfWorkModelFaker = new();
+        private readonly RegisterRequestFaker registerRequestFaker = new();
+
+        public RegisterApplicantRequestFaker(IDateTimeProvider dateTimeProvider)
+        {
+            RuleFor(x => x.ApplicantName, () => nameModelFaker.Generate());
+            RuleFor(x => x.BirthDate, faker => dateTimeProvider.Now().AddYears(-faker.Random.Int(20, 100)));
+            RuleFor(x => x.Citizenship, faker => faker.Address.Country());
+            RuleFor(x => x.CitizenshipByBirth, faker => faker.Address.Country());
+            RuleFor(x => x.CityOfBirth, faker => faker.Address.City());
+            RuleFor(x => x.CountryOfBirth, faker => faker.Address.Country());
+            RuleFor(x => x.FatherName, () => nameModelFaker.Generate());
+            RuleFor(x => x.Gender, faker => faker.PickRandom<Gender>());
+            RuleFor(x => x.IsNonResident, faker => faker.Random.Bool());
+            RuleFor(x => x.JobTitle, faker => faker.Lorem.Word());
+            RuleFor(x => x.MaritalStatus, faker => faker.PickRandom<MaritalStatus>());
+            RuleFor(x => x.MotherName, () => nameModelFaker.Generate());
+            RuleFor(x => x.Passport, () => passportModelFaker.Generate());
+            RuleFor(x => x.PlaceOfWork, () => placeOfWorkModelFaker.Generate());
+            RuleFor(x => x.RegisterRequest, () => registerRequestFaker.Generate());
+        }
+    }
+}

VisaApiTests/Fakers/Auth/RegisterRequestFaker.cs

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+using ApplicationLayer.Services.AuthServices.Requests;
+using Bogus;
+
+namespace VisaApi.Fakers.Auth;
+
+public sealed class RegisterRequestFaker : Faker<RegisterRequest>
+{
+    private static AuthDataFaker authDataFaker = new();
+
+    public RegisterRequestFaker()
+    {
+            RuleFor(r => r.AuthData, () => authDataFaker.Generate());
+    }
+}