replace dates by epoch time millis

API/Controllers/AuthenticationController.cs

@@ -25,7 +25,7 @@ public class AuthenticationController(IUserService service, IConfiguration confi
         string Password
     );
 
-    private record AuthenticationResponse(String Token, DateTime ExpirationDate);
+    private record AuthenticationResponse(String Token, long ExpirationDate);
 
     [HttpPost("/auth/token")]
     public async Task<IActionResult> GenerateToken([FromBody] GenerateTokenRequest req)
@@ -39,7 +39,7 @@ public class AuthenticationController(IUserService service, IConfiguration confi
             });
 
         var (jwt, expirationDate) = GenerateJwt(user);
-        return Ok(new AuthenticationResponse(jwt, expirationDate));
+        return Ok(new AuthenticationResponse(jwt, expirationDate.ToFileTimeUtc()));
     }
 
 
@@ -73,7 +73,7 @@ public class AuthenticationController(IUserService service, IConfiguration confi
         );
 
         var (jwt, expirationDate) = GenerateJwt(user);
-        return Ok(new AuthenticationResponse(jwt, expirationDate));
+        return Ok(new AuthenticationResponse(jwt, expirationDate.ToFileTimeUtc()));
     }
 
 

API/Program.cs

@@ -101,7 +101,7 @@ app.Use((context, next) =>
     var (jwt, expirationDate) = Authentication.GenerateJwt(key, context.User.Claims);
     context.Response.Headers["Next-Authorization"] = jwt;
     context.Response.Headers["Next-Authorization-Expiration-Date"] =
-        expirationDate.ToString(CultureInfo.InvariantCulture);
+        expirationDate.ToFileTimeUtc().ToString();
     context.Response.Headers.AccessControlExposeHeaders = "Next-Authorization, Next-Authorization-Expiration-Date";
     return next.Invoke();
 });