Add FederatedCredentials as an auth type like in .NET SDK #267

"AgentApplication": {
    "UserAuthorization": {
      "DefaultHandlerName": "auto",
      "Handlers": {
        "auto": {
          "Settings": {
            "AzureBotOAuthConnectionName": "teams_sso",
            "OBOConnectionName": "ServiceConnection",
            "OBOScopes": [
              "https://myservicescope.com/.default"
            ]
          }
        }
      }
    }
  },
  "Connections": {
    "ServiceConnection": {
      "Settings": {
        "AuthType": "FederatedCredentials",
        "AuthorityEndpoint": "https://login.microsoftonline.com/{{TenantId}}",
        "ClientId": "{{ClientId}}",
        "FederatedClientId": "{{ManagedIdentityClientId}}",
        "Scopes": [
          "https://api.botframework.com/.default"
        ]
      }
    }
  },