Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.AddIdentityServer()
        .AddDeveloperSigningCredential()
        .AddInMemoryApiResources(new List<ApiResource>
        {
            new ApiResource("resource.server.api",
                new [] { ClaimTypes.Name, ClaimTypes.Email})
        })
        .AddInMemoryClients(new List<Client>
        {
            new Client
            {
                ClientId = "angular.client",
                ClientName = "Angular Client",
                ClientSecrets = new [] { new Secret("secret".Sha256())  },
                AllowedScopes = new [] { "resource.server.api" },
                AllowedGrantTypes = GrantTypes.ResourceOwnerPassword,
                AllowedCorsOrigins = new [] { "http://localhost:4200/" }
            }
        })
        .AddTestUsers(new List<TestUser>
        {
            new TestUser
            {
                SubjectId = "1",
                Username = "user",
                Password = "1234",
                Claims = new List<Claim>
                {
                    new Claim(ClaimTypes.Name, "Test User"),
                    new Claim(ClaimTypes.Email, "email@mail.com")
                }
            }
        });
}