identityserver4 RequestResourceOwnerPasswordAsync unauthorized_client

Question

I dont know why i get unauthorized_client by using tokenClient.RequestResourceOwnerPasswordAsync:

Answer 1

I solved this in 3 steps:

Step 1: Implement IResourceOwnerPasswordValidator: Step 2: Granttype (Resource owner password): Step 3: Configure the service:

   services.AddTransient<IResourceOwnerPasswordValidator, ResourceOwnerPasswordValidator>();