Add signin/failure invoke activity support

[Copilot]

The SDK was throwing validation errors when receiving signin/failure invoke activities because this invoke type was not defined in the activity model discriminated union.

Changes

• Added SignInFailure model (packages/api/src/microsoft/teams/api/models/sign_in/failure.py)

  • Captures code and message from sign-in failures

• Added SignInFailureInvokeActivity (packages/api/src/microsoft/teams/api/activities/invoke/sign_in/failure.py)

  • Handles signin/failure invoke type
  • Follows existing pattern for signin/tokenExchange and signin/verifyState

• Updated SignInInvokeActivity discriminated union

  • Now includes SignInFailureInvokeActivity as a valid member

Example

Activities like this from the issue now parse successfully:

{
  "name": "signin/failure",
  "type": "invoke",
  "value": {
    "code": "resourcematchfailed",
    "message": "Resource match failed"
  },
  ...
}

Before: union_tag_invalid validation error
After: Activity parses correctly, error details available to handlers

Original prompt

---

This section details on the original issue you should resolve

<issue_title>SignIn failures are not handled gracefully.</issue_title>
<issue_description>When there is a sign in failure, the invoke says this. It looks like we're missing a signin/failure invoke type.

[ERROR] @teams/app.HttpPlugin [
[ERROR] @teams/app.HttpPlugin   {
[ERROR] @teams/app.HttpPlugin     "type": "union_tag_invalid",
[ERROR] @teams/app.HttpPlugin     "loc": [
[ERROR] @teams/app.HttpPlugin       "invoke"
[ERROR] @teams/app.HttpPlugin     ],
[ERROR] @teams/app.HttpPlugin     "msg": "Input tag 'signin/failure' found using 'name' does not match any of the expected tags: 'fileConsent/invoke', 'actionableMessage/executeAction', 'composeExtension/anonymousQueryLink', 'composeExtension/onCardButtonClicked', 'composeExtension/fetchTask', 'composeExtension/query', 'composeExtension/queryLink', 'composeExtension/querySettingUrl', 'composeExtension/selectItem', 'composeExtension/setting', 'composeExtension/submitAction', 'config/fetch', 'config/submit', 'tab/fetch', 'tab/submit', 'task/fetch', 'task/submit', 'message/submitAction', 'handoff/action', 'signin/tokenExchange', 'signin/verifyState', 'adaptiveCard/action'",
[ERROR] @teams/app.HttpPlugin     "input": {
[ERROR] @teams/app.HttpPlugin       "name": "signin/failure",
[ERROR] @teams/app.HttpPlugin       "type": "invoke",
[ERROR] @teams/app.HttpPlugin       "timestamp": "2025-11-05T22:22:17.758Z",
[ERROR] @teams/app.HttpPlugin       "localTimestamp": "2025-11-05T14:22:17.758-08:00",
[ERROR] @teams/app.HttpPlugin       "id": "f:1cb5a678-9635-e784-1f0b-dfab7bc0a9d0",
[ERROR] @teams/app.HttpPlugin       "channelId": "msteams",
[ERROR] @teams/app.HttpPlugin       "serviceUrl": "https://smba.trafficmanager.net/amer/56653e9d-2158-46ee-90d7-675c39642038/",
[ERROR] @teams/app.HttpPlugin       "from": {
[ERROR] @teams/app.HttpPlugin         "id": "29:1mucl7V-q79FxvutdFZYmoDU31kcD-H1rzq9likmczten5HjaAYvVz7buaSIHTJKxegI8mEBVYJt2BqJLkFQGBQ",
[ERROR] @teams/app.HttpPlugin         "name": "Aamir Jawaid",
[ERROR] @teams/app.HttpPlugin         "aadObjectId": "4816e27f-5665-4904-a182-f74d3bd509ac"
[ERROR] @teams/app.HttpPlugin       },
[ERROR] @teams/app.HttpPlugin       "conversation": {
[ERROR] @teams/app.HttpPlugin         "conversationType": "personal",
[ERROR] @teams/app.HttpPlugin         "tenantId": "56653e9d-2158-46ee-90d7-675c39642038",
[ERROR] @teams/app.HttpPlugin         "id": "a:12EDAH5_gp4Dl0X7cz84b4He6xkTE08HJs6EekON4_a6isW-pwyADo_9pj-9rDGWd0YlQ77hgMHkZe8laJ-RGzeA8i_C_RF--g73NwjUJe7cEIRQWr6n3NwACa__l54M4"
[ERROR] @teams/app.HttpPlugin       },
[ERROR] @teams/app.HttpPlugin       "recipient": {
[ERROR] @teams/app.HttpPlugin         "id": "28:8435f2a2-aa2c-4e6a-885f-d21469cbb09b",
[ERROR] @teams/app.HttpPlugin         "name": "aamirtesterfic"
[ERROR] @teams/app.HttpPlugin       },
[ERROR] @teams/app.HttpPlugin       "entities": [
[ERROR] @teams/app.HttpPlugin         {
[ERROR] @teams/app.HttpPlugin           "locale": "en-US",
[ERROR] @teams/app.HttpPlugin           "country": "US",
[ERROR] @teams/app.HttpPlugin           "platform": "Web",
[ERROR] @teams/app.HttpPlugin           "timezone": "America/Los_Angeles",
[ERROR] @teams/app.HttpPlugin           "type": "clientInfo"
[ERROR] @teams/app.HttpPlugin         }
[ERROR] @teams/app.HttpPlugin       ],
[ERROR] @teams/app.HttpPlugin       "channelData": {
[ERROR] @teams/app.HttpPlugin         "tenant": {
[ERROR] @teams/app.HttpPlugin           "id": "56653e9d-2158-46ee-90d7-675c39642038"
[ERROR] @teams/app.HttpPlugin         },
[ERROR] @teams/app.HttpPlugin         "source": {
[ERROR] @teams/app.HttpPlugin           "name": "message"
[ERROR] @teams/app.HttpPlugin         }
[ERROR] @teams/app.HttpPlugin       },
[ERROR] @teams/app.HttpPlugin       "value": {
[ERROR] @teams/app.HttpPlugin         "code": "resourcematchfailed",
[ERROR] @teams/app.HttpPlugin         "message": "Resource match failed"
[ERROR] @teams/app.HttpPlugin       },
[ERROR] @teams/app.HttpPlugin       "locale": "en-US",
[ERROR] @teams/app.HttpPlugin       "localTimezone": "America/Los_Angeles"
[ERROR] @teams/app.HttpPlugin     },
[ERROR] @teams/app.HttpPlugin     "ctx": {
[ERROR] @teams/app.HttpPlugin       "discriminator": "'name'",
[ERROR] @teams/app.HttpPlugin       "tag": "signin/failure",
[ERROR] @teams/app.HttpPlugin       "expected_tags": "'fileConsent/invoke', 'actionableMessage/executeAction', 'composeExtension/anonymousQueryLink', 'composeExtension/onCardButtonClicked', 'composeExtension/fetchTask', 'composeExtension/query', 'composeExtension/queryLink', 'composeExtension/querySettingUrl', 'composeExtension/selectItem', 'composeExtension/setting', 'composeExtension/submitAction', 'config/fetch', 'config/submit', 'tab/fetch', 'tab/submit', 'task/fetch', 'task/submit', 'message/submitAction', 'handoff/action', 'signin/tokenExchange', 'signin/verifyState', 'adaptiveCard/action'"
[ERROR] @teams/app.HttpPlugin     },
[ERROR] @teams/app.HttpPlugin     "url"...

</details>

- Fixes microsoft/teams.py#205

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