_signInManager.PasswordSignInAsync() is throwing a NullReferenceException: Object reference not set to an instance of an object.

NullReferenceException: Object reference not set to an instance of an object.
lambda_method46(Closure , QueryContext )
Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteAsync<TResult>(Expression query, CancellationToken cancellationToken)
Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.ExecuteAsync<TResult>(Expression expression, CancellationToken cancellationToken)
Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ExecuteAsync<TSource, TResult>(MethodInfo operatorMethodInfo, IQueryable<TSource> source, Expression expression, CancellationToken cancellationToken)
Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ExecuteAsync<TSource, TResult>(MethodInfo operatorMethodInfo, IQueryable<TSource> source, LambdaExpression expression, CancellationToken cancellationToken)
Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.FirstOrDefaultAsync<TSource>(IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate, CancellationToken cancellationToken)
Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore<TUser, TRole, TContext, TKey, TUserClaim, TUserRole, TUserLogin, TUserToken, TRoleClaim>.FindByNameAsync(string normalizedUserName, CancellationToken cancellationToken)
Microsoft.AspNetCore.Identity.UserManager<TUser>.FindByNameAsync(string userName)
Microsoft.AspNetCore.Identity.SignInManager<TUser>.PasswordSignInAsync(string userName, string password, bool isPersistent, bool lockoutOnFailure)
TherapyPlanner.OAuth.Pages.Login.Index.OnPost() in Index.cshtml.cs
+
                var result = await _signInManager.PasswordSignInAsync(Input.Username, Input.Password, Input.RememberLogin, lockoutOnFailure: true);

We have 2 projects in the same solution

1. IdentityContext : MultiTenantIdentityDbContext<User, Role, Guid, IdentityUserClaim<Guid>, UserRole, IdentityUserLogin<Guid>, IdentityRoleClaim<Guid>, IdentityUserToken<Guid>>
2. ExampleDbContext : DbContext

We’re using the IdentityContext with Duende Server as an Identity Server with Code Grant with PKCE, and ExampleDbContext for our BusinessAPI, both as a multi tenant

I’ve added the migrations and updated the Identity Database, we can see the TenantId for the User,Role, etc…, when I click login after entering the username and password on the login page; the _signInManager.PasswordSignInAsync(Input.Username, Input.Password, Input.RememberLogin, lockoutOnFailure: true); is throwing a null exception

.NET 6, Duende Server V6

[hamedimbasher]

I figured it out, I was using the tenantId in the UserClaim instead of the tenant name, the ClaimStrategy is now picking up the tenant in the HttpContext

Thank you

[AndrewTriesToCode]

I’m glad you got it and sorry I couldn’t be more helpful. I think you’ve got on a good point-- the I’d could also be a valid thing to check. I also think there are situations where a single tenant might have multiple identifiers.