C#C
C#•3y ago
Cutter

❔ ASP.NET Core WebAPI - Cannot choose the AuthenticationScheme for MicrosoftGraphs?

So I am using the Microsoft.Identity.Web Package to get the access token for a user. This works perfectly fine in Swagger.
AppSettings.Json
  "AzureAd": {
    "Instance": "https://login.microsoftonline.com/",
    "ClientId": "<id>",
    "ClientSecret": "<secret>",
    "TenantId": "common",
    "Scopes": "openid User.Read Calendar.ReadWrite"
  },
  "DownstreamApi": {
    "BaseUrl": "https://graph.microsoft.com/v1.0",
    "Scopes": "openid User.Read Calendar.ReadWrite"
  },

Startup.cs
            services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
                .AddMicrosoftIdentityWebApp(Configuration.GetSection("AzureAd"), OpenIdConnectDefaults.AuthenticationScheme)
                .EnableTokenAcquisitionToCallDownstreamApi()
                .AddMicrosoftGraph(Configuration.GetSection("DownstreamApi"))
                .AddDistributedTokenCaches();

The problem is when I try to access The Graph in a Get Method in the controller
        [HttpGet]
        [Route("microsoftgraphauth")]
        [AuthorizeForScopes(AuthenticationScheme = OpenIdConnectDefaults.AuthenticationScheme)]
        public async Task<ActionResult> MicrosoftGraphAuth()
        {
            CalendarCollectionResponse calendars = await graphServiceClient.Me.Calendars.GetAsync();

            return Ok();
        }


I get an error on "CalendarCollectionResponse calendars = await graphServiceClient.Me.Calendars.GetAsync();"
System.InvalidOperationException: IDW10503: Cannot determine the cloud Instance. The provided authentication scheme was ''. Microsoft.Identity.Web inferred 'Bearer' as the authentication scheme. Available authentication schemes are 'Cookies,OpenIdConnect,Bearer'. See https://aka.ms/id-web/authSchemes.


I have come across this post
https://github.com/AzureAD/microsoft-identity-web/wiki/multiple-authentication-schemes
to help me but in the latest version .Request() was removed.

Any Ideas?
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