diff --git a/ApiEfCoreLibrary/Endpoints/Author/CreateAuthorEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Author/CreateAuthorEndpoint.cs
index 0269eef..c22037b 100644
--- a/ApiEfCoreLibrary/Endpoints/Author/CreateAuthorEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Author/CreateAuthorEndpoint.cs
@@ -1,8 +1,8 @@
 using ApiEfCoreLibrary.DTO.Author.Request;
 using ApiEfCoreLibrary.DTO.Author.Response;
+using FastEndpoints;
 
 namespace ApiEfCoreLibrary.Endpoints.Author;
-using FastEndpoints;
 
 public class CreateAuthorEndpoint(LibraryDbContext database) : Endpoint<CreateAuthorDto, GetAuthorDto>
 {
@@ -14,7 +14,7 @@ public class CreateAuthorEndpoint(LibraryDbContext database) : Endpoint<CreateAu
 
     public override async Task HandleAsync(CreateAuthorDto req, CancellationToken ct)
     {
-        var author = new Models.Author()
+        Models.Author author = new Models.Author()
         {
             Name = req.Name,
             FirstName = req.FirstName
diff --git a/ApiEfCoreLibrary/Endpoints/Author/DeleteAuthorEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Author/DeleteAuthorEndpoint.cs
index 1b1bb51..714ee78 100644
--- a/ApiEfCoreLibrary/Endpoints/Author/DeleteAuthorEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Author/DeleteAuthorEndpoint.cs
@@ -20,7 +20,7 @@ public class DeleteAuthorEndpoint(LibraryDbContext database) : Endpoint<DeleteAu
 
     public override async Task HandleAsync(DeleteAuthorRequest req, CancellationToken ct)
     {
-        var author = await database.Authors.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Author? author = await database.Authors.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (author == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Author/GetAllAuthorsEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Author/GetAllAuthorsEndpoint.cs
index abd0710..ac582ae 100644
--- a/ApiEfCoreLibrary/Endpoints/Author/GetAllAuthorsEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Author/GetAllAuthorsEndpoint.cs
@@ -15,7 +15,7 @@ public class GetAllAuthorsEndpoint(LibraryDbContext database) : EndpointWithoutR
 
     public override async Task HandleAsync(CancellationToken ct)
     {
-        var authors = await database.Authors
+        List<GetAuthorDto> authors = await database.Authors
             .Include(x => x.Books)
             .Select(author => new GetAuthorDto()
             {
diff --git a/ApiEfCoreLibrary/Endpoints/Author/GetAuthorEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Author/GetAuthorEndpoint.cs
index 478941d..e1c879b 100644
--- a/ApiEfCoreLibrary/Endpoints/Author/GetAuthorEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Author/GetAuthorEndpoint.cs
@@ -21,7 +21,7 @@ public class GetAuthorEndpoint(LibraryDbContext database) : Endpoint<GetAuthorRe
 
     public override async Task HandleAsync(GetAuthorRequest req, CancellationToken ct)
     {
-        var author = await database.Authors
+        Models.Author? author = await database.Authors
             .Include(x => x.Books)
             .SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
diff --git a/ApiEfCoreLibrary/Endpoints/Author/UpdateAuthorEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Author/UpdateAuthorEndpoint.cs
index e6f5308..0fab5ec 100644
--- a/ApiEfCoreLibrary/Endpoints/Author/UpdateAuthorEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Author/UpdateAuthorEndpoint.cs
@@ -16,7 +16,7 @@ public class UpdateAuthorEndpoint(LibraryDbContext database) : Endpoint<UpdateAu
 
     public override async Task HandleAsync(UpdateAuthorDto req, CancellationToken ct)
     {
-        var author = await database.Authors.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Author? author = await database.Authors.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (author == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Book/CreateBookEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Book/CreateBookEndpoint.cs
index 94b19b1..af92df9 100644
--- a/ApiEfCoreLibrary/Endpoints/Book/CreateBookEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Book/CreateBookEndpoint.cs
@@ -15,7 +15,7 @@ public class CreateBookEndpoint(LibraryDbContext database) : Endpoint<CreateBook
 
     public override async Task HandleAsync(CreateBookDto req, CancellationToken ct)
     {
-        var authorExists = await database.Authors.FirstOrDefaultAsync(a => a.Id == req.AuthorId, ct);
+        Models.Author? authorExists = await database.Authors.FirstOrDefaultAsync(a => a.Id == req.AuthorId, ct);
         
         if (authorExists == null)
         {
@@ -23,7 +23,7 @@ public class CreateBookEndpoint(LibraryDbContext database) : Endpoint<CreateBook
             return;
         }
         
-        var book = new Models.Book()
+        Models.Book book = new Models.Book()
         {
             Title = req.Title,
             AuthorId = req.AuthorId,
diff --git a/ApiEfCoreLibrary/Endpoints/Book/DeleteBookEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Book/DeleteBookEndpoint.cs
index 80cbd9c..dbbc8ed 100644
--- a/ApiEfCoreLibrary/Endpoints/Book/DeleteBookEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Book/DeleteBookEndpoint.cs
@@ -21,7 +21,7 @@ public class DeleteBookEndpoint(LibraryDbContext database) : Endpoint<DeleteBook
 
     public override async Task HandleAsync(DeleteBookRequest req, CancellationToken ct)
     {
-        var book = await database.Books.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Book? book = await database.Books.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (book == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Book/GetAllBooksEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Book/GetAllBooksEndpoint.cs
index 6f439ee..b633e7e 100644
--- a/ApiEfCoreLibrary/Endpoints/Book/GetAllBooksEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Book/GetAllBooksEndpoint.cs
@@ -13,7 +13,7 @@ public class GetAllBooksEndpoint(LibraryDbContext database) : EndpointWithoutReq
 
     public override async Task HandleAsync(CancellationToken ct)
     {
-        var books = await database.Books
+        List<GetBookDto> books = await database.Books
             .Include(b => b.Author)
             .Select(book => new GetBookDto()
             {
diff --git a/ApiEfCoreLibrary/Endpoints/Book/GetBookEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Book/GetBookEndpoint.cs
index 888a159..6d988e0 100644
--- a/ApiEfCoreLibrary/Endpoints/Book/GetBookEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Book/GetBookEndpoint.cs
@@ -18,7 +18,7 @@ public class GetBookEndpoint(LibraryDbContext database) : Endpoint<GetBookReques
 
     public override async Task HandleAsync(GetBookRequest req, CancellationToken ct)
     {
-        var book = await database.Books.Include(b => b.Author).SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Book? book = await database.Books.Include(b => b.Author).SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (book == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Book/UpdateBookEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Book/UpdateBookEndpoint.cs
index 144a25f..4b37014 100644
--- a/ApiEfCoreLibrary/Endpoints/Book/UpdateBookEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Book/UpdateBookEndpoint.cs
@@ -15,7 +15,7 @@ public class UpdateBookEndpoint(LibraryDbContext database) : Endpoint<UpdateBook
 
     public override async Task HandleAsync(UpdateBookDto req, CancellationToken ct)
     {
-        var book = await database.Books.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Book? book = await database.Books.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (book == null)
         {
@@ -23,7 +23,7 @@ public class UpdateBookEndpoint(LibraryDbContext database) : Endpoint<UpdateBook
             return;
         }
         
-        var authorExists = await database.Authors.FirstOrDefaultAsync(a => a.Id == req.AuthorId, ct);
+        Models.Author? authorExists = await database.Authors.FirstOrDefaultAsync(a => a.Id == req.AuthorId, ct);
         
         if (authorExists == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Loan/CreateLoanEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Loan/CreateLoanEndpoint.cs
index 2e57126..05e6f22 100644
--- a/ApiEfCoreLibrary/Endpoints/Loan/CreateLoanEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Loan/CreateLoanEndpoint.cs
@@ -15,7 +15,7 @@ public class CreateLoanEndpoint(LibraryDbContext database) : Endpoint<CreateLoan
 
     public override async Task HandleAsync(CreateLoanDto req, CancellationToken ct)
     {
-        var bookExists = await database.Books.FirstOrDefaultAsync(a => a.Id == req.BookId, ct);
+        Models.Book? bookExists = await database.Books.FirstOrDefaultAsync(a => a.Id == req.BookId, ct);
         
         if (bookExists == null)
         {
@@ -23,7 +23,7 @@ public class CreateLoanEndpoint(LibraryDbContext database) : Endpoint<CreateLoan
             return;
         }
         
-        var userExists = await database.Users.FirstOrDefaultAsync(a => a.Id == req.UserId, ct);
+        Models.User? userExists = await database.Users.FirstOrDefaultAsync(a => a.Id == req.UserId, ct);
         
         if (userExists == null)
         {
@@ -31,7 +31,7 @@ public class CreateLoanEndpoint(LibraryDbContext database) : Endpoint<CreateLoan
             return;
         }
         
-        var loan = new Models.Loan()
+        Models.Loan loan = new Models.Loan()
         {
             BookId = req.BookId,
             UserId = req.UserId,
diff --git a/ApiEfCoreLibrary/Endpoints/Loan/DeleteLoanEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Loan/DeleteLoanEndpoint.cs
index d29c05b..7645840 100644
--- a/ApiEfCoreLibrary/Endpoints/Loan/DeleteLoanEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Loan/DeleteLoanEndpoint.cs
@@ -21,7 +21,7 @@ public class DeleteLoanEndpoint(LibraryDbContext database) : Endpoint<DeleteLoan
 
     public override async Task HandleAsync(DeleteLoanRequest req, CancellationToken ct)
     {
-        var loan = await database.Loans.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Loan? loan = await database.Loans.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (loan == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Loan/GetAllLoansEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Loan/GetAllLoansEndpoint.cs
index e942f98..1a60c1e 100644
--- a/ApiEfCoreLibrary/Endpoints/Loan/GetAllLoansEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Loan/GetAllLoansEndpoint.cs
@@ -13,7 +13,7 @@ public class GetAllLoanEndpoint(LibraryDbContext database) : EndpointWithoutRequ
 
     public override async Task HandleAsync(CancellationToken ct)
     {
-        var loans = await database.Loans
+        List<GetLoanDto> loans = await database.Loans
             .Include(l => l.Book)
             .ThenInclude(b => b.Author)
             .Include(l => l.User)
diff --git a/ApiEfCoreLibrary/Endpoints/Loan/GetLoanEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Loan/GetLoanEndpoint.cs
index 10c92af..69b9c5f 100644
--- a/ApiEfCoreLibrary/Endpoints/Loan/GetLoanEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Loan/GetLoanEndpoint.cs
@@ -18,7 +18,7 @@ public class GetLoanEndpoint(LibraryDbContext database) : Endpoint<GetLoanReques
 
     public override async Task HandleAsync(GetLoanRequest req, CancellationToken ct)
     {
-        var loan = await database.Loans.Include(l => l.Book)
+        Models.Loan? loan = await database.Loans.Include(l => l.Book)
             .ThenInclude(b => b.Author)
             .Include(l => l.User)
             .SingleOrDefaultAsync(x => x.Id == req.Id, ct);
diff --git a/ApiEfCoreLibrary/Endpoints/Loan/PatchLoanEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Loan/PatchLoanEndpoint.cs
index 018ea2d..152a20b 100644
--- a/ApiEfCoreLibrary/Endpoints/Loan/PatchLoanEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Loan/PatchLoanEndpoint.cs
@@ -1,53 +1,53 @@
-using ApiEfCoreLibrary.DTO.Loan.Request;
-using ApiEfCoreLibrary.DTO.Loan.Response;
-using FastEndpoints;
-using Microsoft.EntityFrameworkCore;
-
-namespace ApiEfCoreLibrary.Endpoints.Loan;
-
-public class PatchLoanEndpoint(LibraryDbContext database) : Endpoint<PatchLoanDto, GetLoanDto>
-{
-    public override void Configure()
-    {
-        Patch("/api/loans/{@Id}/EffectiveReturningDate", x => new {x.Id});
-        Roles("admin", "librarian");
-    }
-
-    public override async Task HandleAsync(PatchLoanDto req, CancellationToken ct)
-    {
-        var loan = await database.Loans.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
-
-        if (loan == null)
-        {
-            await Send.NotFoundAsync(ct);
-            return;
-        }
-
-        if (req.EffectiveReturningDate <= DateOnly.FromDateTime(DateTime.Now))
-        {
-            await Send.StringAsync("Erreur de date. La date est inférieure à la date actuelle.", 400);
-            return;
-        }
-
-        if (loan.EffectiveReturningDate != null)
-        {
-            await Send.StringAsync("Impossible de modifier la date de retour.", 400);
-            return;
-        }
-        
-        loan.EffectiveReturningDate = req.EffectiveReturningDate;
-        await database.SaveChangesAsync(ct);
-        
-        GetLoanDto responseDto = new()
-        {
-            Id = loan.Id,
-            BookId = loan.BookId,
-            UserId = loan.UserId,
-            Date = loan.Date,
-            PlannedReturningDate = loan.PlannedReturningDate,
-            EffectiveReturningDate = loan.EffectiveReturningDate
-        };
-        
-        await Send.OkAsync(responseDto, ct);
-    }
+using ApiEfCoreLibrary.DTO.Loan.Request;
+using ApiEfCoreLibrary.DTO.Loan.Response;
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+
+namespace ApiEfCoreLibrary.Endpoints.Loan;
+
+public class PatchLoanEndpoint(LibraryDbContext database) : Endpoint<PatchLoanDto, GetLoanDto>
+{
+    public override void Configure()
+    {
+        Patch("/api/loans/{@Id}/EffectiveReturningDate", x => new {x.Id});
+        Roles("admin", "librarian");
+    }
+
+    public override async Task HandleAsync(PatchLoanDto req, CancellationToken ct)
+    {
+        Models.Loan? loan = await database.Loans.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+
+        if (loan == null)
+        {
+            await Send.NotFoundAsync(ct);
+            return;
+        }
+
+        if (req.EffectiveReturningDate <= DateOnly.FromDateTime(DateTime.Now))
+        {
+            await Send.StringAsync("Erreur de date. La date est inférieure à la date actuelle.", 400);
+            return;
+        }
+
+        if (loan.EffectiveReturningDate != null)
+        {
+            await Send.StringAsync("Impossible de modifier la date de retour.", 400);
+            return;
+        }
+        
+        loan.EffectiveReturningDate = req.EffectiveReturningDate;
+        await database.SaveChangesAsync(ct);
+        
+        GetLoanDto responseDto = new()
+        {
+            Id = loan.Id,
+            BookId = loan.BookId,
+            UserId = loan.UserId,
+            Date = loan.Date,
+            PlannedReturningDate = loan.PlannedReturningDate,
+            EffectiveReturningDate = loan.EffectiveReturningDate
+        };
+        
+        await Send.OkAsync(responseDto, ct);
+    }
 }
\ No newline at end of file
diff --git a/ApiEfCoreLibrary/Endpoints/Loan/UpdateLoanEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Loan/UpdateLoanEndpoint.cs
index 5e49ead..6e47925 100644
--- a/ApiEfCoreLibrary/Endpoints/Loan/UpdateLoanEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Loan/UpdateLoanEndpoint.cs
@@ -15,7 +15,7 @@ public class UpdateLoanEndpoint(LibraryDbContext database) : Endpoint<UpdateLoan
 
     public override async Task HandleAsync(UpdateLoanDto req, CancellationToken ct)
     {
-        var loan = await database.Loans.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Loan? loan = await database.Loans.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (loan == null)
         {
@@ -23,7 +23,7 @@ public class UpdateLoanEndpoint(LibraryDbContext database) : Endpoint<UpdateLoan
             return;
         }
         
-        var bookExists = await database.Books.FirstOrDefaultAsync(a => a.Id == req.BookId, ct);
+        Models.Book? bookExists = await database.Books.FirstOrDefaultAsync(a => a.Id == req.BookId, ct);
         
         if (bookExists == null)
         {
@@ -31,7 +31,7 @@ public class UpdateLoanEndpoint(LibraryDbContext database) : Endpoint<UpdateLoan
             return;
         }
         
-        var userExists = await database.Users.FirstOrDefaultAsync(a => a.Id == req.UserId, ct);
+        Models.User? userExists = await database.Users.FirstOrDefaultAsync(a => a.Id == req.UserId, ct);
         
         if (userExists == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Login/CreateLoginEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Login/CreateLoginEndpoint.cs
index c71ed2e..1ada6f2 100644
--- a/ApiEfCoreLibrary/Endpoints/Login/CreateLoginEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Login/CreateLoginEndpoint.cs
@@ -17,7 +17,7 @@ public class CreateLoginEndpoint(LibraryDbContext database) : Endpoint<CreateLog
     {
         string? salt = new Password().IncludeLowercase().IncludeUppercase().IncludeNumeric().LengthRequired(24).Next();
         
-        var login = new Models.Login()
+        Models.Login login = new Models.Login()
         {
             Username = req.Username,
             FullName = req.FullName,
diff --git a/ApiEfCoreLibrary/Endpoints/Login/DeleteLoginEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Login/DeleteLoginEndpoint.cs
index c3389b4..b250c33 100644
--- a/ApiEfCoreLibrary/Endpoints/Login/DeleteLoginEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Login/DeleteLoginEndpoint.cs
@@ -19,7 +19,7 @@ public class DeleteLoginEndpoint(LibraryDbContext database) : Endpoint<DeleteLog
 
     public override async Task HandleAsync(DeleteLoginRequest req, CancellationToken ct)
     {
-        var login = await database.Logins.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Login? login = await database.Logins.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (login == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Login/GetAllLoginEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Login/GetAllLoginEndpoint.cs
index f050fb7..a4fe428 100644
--- a/ApiEfCoreLibrary/Endpoints/Login/GetAllLoginEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Login/GetAllLoginEndpoint.cs
@@ -14,7 +14,7 @@ public class GetAllLoginEndpoint(LibraryDbContext database) : EndpointWithoutReq
 
     public override async Task HandleAsync(CancellationToken ct)
     {
-        var logins = await database.Logins
+        List<GetLoginDto> logins = await database.Logins
             .Select(login => new GetLoginDto()
             {
                 Id = login.Id,
diff --git a/ApiEfCoreLibrary/Endpoints/Login/GetLoginEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Login/GetLoginEndpoint.cs
index 9ec4d4b..2810592 100644
--- a/ApiEfCoreLibrary/Endpoints/Login/GetLoginEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Login/GetLoginEndpoint.cs
@@ -18,7 +18,7 @@ public class GetLoginEndpoint(LibraryDbContext database) : Endpoint<GetLoginRequ
 
     public override async Task HandleAsync(GetLoginRequest req, CancellationToken ct)
     {
-        var login = await database.Logins
+        Models.Login? login = await database.Logins
             .SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (login == null)
diff --git a/ApiEfCoreLibrary/Endpoints/Login/UpdateLoginEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Login/UpdateLoginEndpoint.cs
index 7a7e9fb..18b25d2 100644
--- a/ApiEfCoreLibrary/Endpoints/Login/UpdateLoginEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Login/UpdateLoginEndpoint.cs
@@ -16,7 +16,7 @@ public class UpdateLoginEndpoint(LibraryDbContext database) : Endpoint<UpdateLog
 
     public override async Task HandleAsync(UpdateLoginDto req, CancellationToken ct)
     {
-        var login = await database.Logins.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.Login? login = await database.Logins.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (login == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/Login/UserLoginEndpoint.cs b/ApiEfCoreLibrary/Endpoints/Login/UserLoginEndpoint.cs
index e743d70..9a22d15 100644
--- a/ApiEfCoreLibrary/Endpoints/Login/UserLoginEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/Login/UserLoginEndpoint.cs
@@ -16,7 +16,7 @@ public class UserLoginEndpoint(LibraryDbContext database) : Endpoint<ConnectLogi
 
     public override async Task HandleAsync(ConnectLoginDto req, CancellationToken ct)
     {
-        var login = await database.Logins.SingleOrDefaultAsync(x => x.Username == req.Username, ct);
+        Models.Login? login = await database.Logins.SingleOrDefaultAsync(x => x.Username == req.Username, ct);
 
         if (login == null)
         {
@@ -26,7 +26,7 @@ public class UserLoginEndpoint(LibraryDbContext database) : Endpoint<ConnectLogi
         
         if (BCrypt.Net.BCrypt.Verify(req.Password + login.Salt, login.Password))
         {
-            var jwtToken = JwtBearer.CreateToken(
+            string jwtToken = JwtBearer.CreateToken(
                 o =>
                 {
                     o.SigningKey = "ThisIsASuperSecretJwtKeyThatIsAtLeast32CharsLong";
diff --git a/ApiEfCoreLibrary/Endpoints/User/CreateUserEndpoint.cs b/ApiEfCoreLibrary/Endpoints/User/CreateUserEndpoint.cs
index e032066..4b11713 100644
--- a/ApiEfCoreLibrary/Endpoints/User/CreateUserEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/User/CreateUserEndpoint.cs
@@ -14,7 +14,7 @@ public class CreateUserEndpoint(LibraryDbContext database) : Endpoint<CreateUser
 
     public override async Task HandleAsync(CreateUserDto req, CancellationToken ct)
     {
-        var user = new Models.User()
+        Models.User user = new Models.User()
         {
             Name = req.Name,
             FirstName = req.FirstName,
diff --git a/ApiEfCoreLibrary/Endpoints/User/DeleteUserEndpoint.cs b/ApiEfCoreLibrary/Endpoints/User/DeleteUserEndpoint.cs
index ee7a42f..de273f6 100644
--- a/ApiEfCoreLibrary/Endpoints/User/DeleteUserEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/User/DeleteUserEndpoint.cs
@@ -20,7 +20,7 @@ public class DeleteUserEndpoint(LibraryDbContext database) : Endpoint<DeleteUser
 
     public override async Task HandleAsync(DeleteUserRequest req, CancellationToken ct)
     {
-        var user = await database.Users.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.User? user = await database.Users.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (user == null)
         {
diff --git a/ApiEfCoreLibrary/Endpoints/User/GetAllUsersEndpoint.cs b/ApiEfCoreLibrary/Endpoints/User/GetAllUsersEndpoint.cs
index c8a4c8f..cddd6c7 100644
--- a/ApiEfCoreLibrary/Endpoints/User/GetAllUsersEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/User/GetAllUsersEndpoint.cs
@@ -14,7 +14,7 @@ public class GetAllUsersEndpoint(LibraryDbContext database) : EndpointWithoutReq
 
     public override async Task HandleAsync(CancellationToken ct)
     {
-        var user = await database.Users
+        List<GetUserDto> user = await database.Users
             .Include(x => x.Loans)!
             .ThenInclude(l => l.Book)
             .ThenInclude(b => b!.Author)
diff --git a/ApiEfCoreLibrary/Endpoints/User/GetUserEndpoint.cs b/ApiEfCoreLibrary/Endpoints/User/GetUserEndpoint.cs
index 09815dc..5cf4848 100644
--- a/ApiEfCoreLibrary/Endpoints/User/GetUserEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/User/GetUserEndpoint.cs
@@ -20,7 +20,7 @@ public class GetUserEndpoint(LibraryDbContext database) : Endpoint<GetUserReques
 
     public override async Task HandleAsync(GetUserRequest req, CancellationToken ct)
     {
-        var user = await database.Users
+        Models.User? user = await database.Users
             .Include(x => x.Loans)!
             .ThenInclude(l => l.Book)
             .ThenInclude(b => b!.Author)
diff --git a/ApiEfCoreLibrary/Endpoints/User/UpdateUserEndpoint.cs b/ApiEfCoreLibrary/Endpoints/User/UpdateUserEndpoint.cs
index 27acb5d..27b2e8c 100644
--- a/ApiEfCoreLibrary/Endpoints/User/UpdateUserEndpoint.cs
+++ b/ApiEfCoreLibrary/Endpoints/User/UpdateUserEndpoint.cs
@@ -15,7 +15,7 @@ public class UpdateUserEndpoint(LibraryDbContext database) : Endpoint<UpdateUser
 
     public override async Task HandleAsync(UpdateUserDto req, CancellationToken ct)
     {
-        var user = await database.Users.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
+        Models.User? user = await database.Users.SingleOrDefaultAsync(x => x.Id == req.Id, ct);
 
         if (user == null)
         {