I’ve changed the Identity user key from a GUID to an int in a .NET Core APIs application. Since making this change, every API call returns the following error:

{
  "Code": 500,
  "Message": "331b9a42-6807-46ca-97ee-7c9bbe518ef7 is not a valid value for Int64. (Parameter 'value')"
}

Despite following the setup steps, the issue persists. Here is the current setup:

public class BrokerDbContext : IdentityDbContext<ApplicationUser, IdentityRole<long>, long>

public class ApplicationUser : IdentityUser<long>, ICreationDateAuditedEntity, IModificationDateAuditedEntity, IStripeEntity

builder.Services.AddIdentity<ApplicationUser, IdentityRole<long>>()
    .AddEntityFrameworkStores<BrokerWiseDbContext>()
    .AddDefaultTokenProviders();

However, it seems the system is still trying to process GUIDs, resulting in the error.

full error:

    [18:13:11 ERR] An unhandled exception has occurred while executing the request.
System.ArgumentException: 331b9a42-6807-46ca-97ee-7c9bbe518ef7 is not a valid value for Int64. (Parameter 'value')
 ---> System.FormatException: The input string '331b9a42-6807-46ca-97ee-7c9bbe518ef7' was not in a correct format.
   at System.Number.ThrowOverflowOrFormatException(ParsingStatus status, ReadOnlySpan`1 value, TypeCode type)
   at System.Int64.Parse(String s, NumberStyles style, IFormatProvider provider)
   at System.ComponentModel.Int64Converter.FromString(String value, NumberFormatInfo formatInfo)
   at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   --- End of inner exception stack trace ---
   at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   at Microsoft.AspNetCore.Identity.UserStoreBase`5.ConvertIdFromString(String id)
   at Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore`9.FindByIdAsync(String userId, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Identity.UserManager`1.GetUserAsync(ClaimsPrincipal principal)
   at Microsoft.AspNetCore.Identity.SignInManager`1.ValidateSecurityStampAsync(ClaimsPrincipal principal)
   at Microsoft.AspNetCore.Identity.SecurityStampValidator`1.ValidateAsync(CookieValidatePrincipalContext context)
   at Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationHandler.HandleAuthenticateAsync()
   at Microsoft.AspNetCore.Authentication.AuthenticationHandler`1.AuthenticateAsync()
   at Microsoft.AspNetCore.Authentication.AuthenticationService.AuthenticateAsync(HttpContext context, String scheme)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddlewareImpl.<Invoke>g__Awaited|8_0(ExceptionHandlerMiddlewareImpl middleware, HttpContext context, Task task)

and changes are reflected in the DB.