🐛 Bug Report: Create / Get User fails with "Unable to cast object of type 'System.Object[]' to type 'System.Collections.Generic.List`1[System.String]"

[andyzukunft]

👟 Reproduction steps

• Use Appwrite .NET SDK v0.19.0 and current Apprwite Cloud or Appwrite 1.8.0-RC3 hosted backend.
• Execute command to Appwrite backend (example: create new user, get existing user)
• User is created in Appwrite, return result creates an exception in .NET application

[ApiController]
[Route("api/[controller]")]
public class UserController : ControllerBase
{
    public async Task<User> GetUser(Client client, string userId)
    {
        var userService = new Users(client);
        var user = await userService.Get(userId);

        return user;
    }

    public async Task<User> CreateUser(Client client, string userMail, string userName)
    {
        var userService = new Users(client);
        var user = await userService.Create(ID.Unique(), email: userMail, name: userName);

        return user;
    }
}

👍 Expected behavior

Execution should be working without exception on result return.

I have not tested it with other features as I just starting with Appwrite. Must be checked if other commands result in the same behaviour.

👎 Actual Behavior

Executing commands to Appwrite (here: UserController.CreateUser()) results in the result data to be invalid. However the user was created in Appwrite.

Exception thrown:

Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
      An unhandled exception has occurred while executing the request.
      System.InvalidCastException: Unable to cast object of type 'System.Object[]' to type 'System.Collections.Generic.List`1[System.String]'.
         at Appwrite.Models.User.From(Dictionary`2 map)
         at Appwrite.Services.Users.<Create>g__Convert|2_0(Dictionary`2 it)
         at Appwrite.Client.Call[T](String method, String path, Dictionary`2 headers, Dictionary`2 parameters, Func`2 convert)
         at [redacted].UserController.CreateUser(Client client, String userMail, String userName) in [redacted]\UserController.cs:line 24
         at lambda_method4(Closure, Object)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
         at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
         at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

🎲 Appwrite version

Different version (specify in environment)

💻 Operating system

Linux

🧱 Your Environment

Appwrite Cloud: 2025-10-06
Appwrite Hosted: 1.8.0-RC3
Appwrite .NET SDK: 0.19.0

👀 Have you spent some time to check if this issue has been raised before?

• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct