Using ASP Core Identity with mongo-efcore causes errors

[Saylent_N_A]

I recently created a new ASP Core application with a simple individual authentication using email and password with minimal configuration other than changing the database MongoDB. However i get the error when attempting to create a new IdentityUser via registration

MongoDB.Driver.Linq.ExpressionNotSupportedException: Expression not supported: i.ToClaim().
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodCallExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, MethodCallExpression expression)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, Expression expression)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.TranslateLambdaBody(TranslationContext context, LambdaExpression lambdaExpression, Symbol parameterSymbol)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.TranslateLambdaBody(TranslationContext context, LambdaExpression lambdaExpression, IBsonSerializer parameterSerializer, Boolean asRoot)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToPipelineTranslators.SelectMethodToPipelineTranslator.Translate(TranslationContext context, MethodCallExpression expression)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToPipelineTranslators.ExpressionToPipelineTranslator.Translate(TranslationContext context, Expression expression)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToExecutableQueryTranslators.ExpressionToExecutableQueryTranslator.Translate[TDocument,TOutput](MongoQueryProvider`1 provider, Expression expression, ExpressionTranslationOptions translationOptions)
   at MongoDB.Driver.Linq.Linq3Implementation.MongoQuery`2.Execute()
   at MongoDB.Driver.Linq.Linq3Implementation.MongoQuery`2.GetEnumerator()
   at MongoDB.EntityFrameworkCore.Query.QueryingEnumerable`2.Enumerator.MoveNextHelper()
   at MongoDB.EntityFrameworkCore.Query.QueryingEnumerable`2.Enumerator.MoveNextAsync()
   at System.Runtime.CompilerServices.ConfiguredCancelableAsyncEnumerable`1.Enumerator.MoveNextAsync()
   at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToListAsync[TSource](IQueryable`1 source, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToListAsync[TSource](IQueryable`1 source, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`6.GetClaimsAsync(TUser user, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Identity.UserManager`1.GetClaimsAsync(TUser user)
   at Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory`1.GenerateClaimsAsync(TUser user)
   at Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory`1.CreateAsync(TUser user)
   at Sora.Data.AdditionalClaims.CreateAsync(User user) in E:\Stuff\aspmongodtest\aspmongodtest\Data\UserRep.cs:line 25```

Below is my code

using System.Security.Claims;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using Sora.Models;
using Sora.Models.Localize;

namespace Sora.Data;

public class UserRep : UserClaimsPrincipalFactory<User>
{
    private readonly ApplicationDbContext _dbContext;

    public UserRep (
        UserManager<User> userManager,
        IOptions<IdentityOptions> optionsAccessor,
        ApplicationDbContext dbContext)
        : base(userManager, optionsAccessor)
    {
        _dbContext = dbContext;
    }

    public override async Task<ClaimsPrincipal> CreateAsync(User user)
    {
        var principal = await base.CreateAsync(user); // error happens here

        if (principal.Identity is ClaimsIdentity claimsIdentity)
        {
            claimsIdentity.AddClaim(
                new Claim("UserId", user.Id ?? string.Empty));

            if (!string.IsNullOrEmpty(user.ImageHash))
            {
                claimsIdentity.AddClaim(
                    new Claim("ImageHash", user.ImageHash));
            }
        }

        return principal;
    }
}