(C#) Microsoft Teams OAuth2 Client Credentials Authentication

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Demonstrates how to authenticate with OAuth 2.0 using the client credentials grant type.

Note: This example uses the new "Integrated OAuth2 Client Credentials" feature introduced in Chilkat v9.5.0.96.

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// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

bool success;
Chilkat.Http http = new Chilkat.Http();

// Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
// access token as needed.
// This is the new "Integrated OAuth2 Client Credentials" feature introduced in Chilkat v9.5.0.96.  
Chilkat.JsonObject jsonOAuthCC = new Chilkat.JsonObject();

// --------------------------------------------------------------------------------------------------------
// You'll need to have registered an app in Azure beforehand.
// 
// Note: Creating a Team requires the following Application permissions:
// Team.Create, Teamwork.Migrate.All, Group.ReadWrite.All**, Directory.ReadWrite.All**
// 
// See How to Create an Azure App Registration for OAuth 2.0 Client Credentials
// --------------------------------------------------------------------------------------------------------

// Use the values from your App Registration in Azure.
jsonOAuthCC.UpdateString("client_id","e1cd2318-xxxx-4916-bfd6-xxxxxxxxxxxx");
jsonOAuthCC.UpdateString("client_secret","K.d8Q~RoJxxxxvCj_u_xxxxxxxxxxxxxxxxxxxxx");

// You'll always use this scope for client credentials, because the allowed actions
// are determined by the App Permissions defined when you registered the app in Azure.
jsonOAuthCC.UpdateString("scope","https://graph.microsoft.com/.default");

// The token endpoint includes your tenant ID.  Use your tenant ID (not the tenant ID shown here).
jsonOAuthCC.UpdateString("token_endpoint","https://login.microsoftonline.com/112d7ed6-71bf-4eba-a866-738364321bfc/oauth2/v2.0/token");

// Provide the OAuth2 information. Chilkat will use this information to automatically fetch the OAuth2 access token as needed,
http.AuthToken = jsonOAuthCC.Emit();

// ------------------------------------------------------------------------------
// To create a Microsoft Team, we want to send an HTTP request like the following:
// 
// Note: The following is the minimal JSON for a request using Applicaton permissions (i.e. the access token retrieved using the client credentials grant).
// 
// POST https://graph.microsoft.com/v1.0/teams
// Content-Type: application/json
// 
// {
//    "template@odata.bind":"https://graph.microsoft.com/v1.0/teamsTemplates('standard')",
//    "displayName":"My Sample Team",
//    "description":"My Sample Teams Description",
//    "members":[
//       {
//          "@odata.type":"#microsoft.graph.aadUserConversationMember",
//          "roles":[
//             "owner"
//          ],
//          "user@odata.bind":"https://graph.microsoft.com/v1.0/users('0040b377-61d8-43db-94f5-81374122dc7e')"
//       }
//    ]
// }

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("\"template@odata.bind\"","https://graph.microsoft.com/v1.0/teamsTemplates('standard')");
json.UpdateString("displayName","My Sample Team");
json.UpdateString("description","My Sample Teams Description");
json.UpdateString("members[0].\"@odata.type\"","#microsoft.graph.aadUserConversationMember");
json.UpdateString("members[0].roles[0]","owner");
json.UpdateString("members[0].\"user@odata.bind\"","https://graph.microsoft.com/v1.0/users('4ee732c3-322e-4a6b-b729-2fd1eb5c6004')");

json.EmitCompact = false;
Debug.WriteLine(json.Emit());

http.SetRequestHeader("Content-type","application/json");

Chilkat.HttpResponse resp = http.PostJson3("https://graph.microsoft.com/v1.0/teams","application/json",json);
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

// A successful response is indicated by a 202 response status code and an empty response body.
Debug.WriteLine("Response Status Code: " + Convert.ToString(resp.StatusCode));
Debug.WriteLine("Response Body:");
Debug.WriteLine(resp.BodyStr);

if (resp.StatusCode >= 400) {
    Debug.WriteLine("Response Header:");
    Debug.WriteLine(resp.Header);
    Debug.WriteLine("Failed.");
}