I want to call a messaging extension (with action command) and access Graph API via a bot for getting different resources of the channel (e.g. retrieve all messages or get replies for my message). In the examples from Microsoft it is stated as a prerequisite that I have to do the "Bot channels registration" so that the access of the bot to the Graph API via OAuth2 works. Do I really need this channel registration? Or is there another way?
As a test, I had created a azure free trial, with which I performed the "Bot channels registration" and could also save the ID and secret for the Graph Api access in the registration. With this I had success. Now the 30 days testing period is over and I'm interested in whether it would work without.
Thanks for your help
Update: Thats my code to initialize graph api:
IConfidentialClientApplication app = ConfidentialClientApplicationBuilder.Create(AppId)
.WithClientSecret(AppSecret)
.WithAuthority(new Uri($"https://login.microsoftonline.com/{Tenant}"))
.Build();
string[] scopes = new string[] { "https://graph.microsoft.com/.default" };
AuthenticationResult authenticationResult = await app.AcquireTokenForClient(scopes).ExecuteAsync();
var graphServiceClient = new GraphServiceClient(new DelegateAuthenticationProvider((requestMessage) =>
{
requestMessage
.Headers
.Authorization = new AuthenticationHeaderValue("Bearer", authenticationResult.AccessToken);
return Task.FromResult(0);
}));
var channels = graphServiceClient.Teams["123"].Channels.Request().GetAsync().Result;But the following call returns an UnknownErrorvar messages = graphServiceClient.Teams["123"].Channels["456"].Messages.Request().GetAsync().Result;I assume this is related to the access type (delegated or application permissions). Can someone explain why it doesn't work? – Anne