# SignInValueSpec

- [JSON representation](https://developers.google.com/assistant/df-asdk/reference/webhook/rest/Shared.Types/SignInValueSpec#SCHEMA_REPRESENTATION)

Passed from the app as input for `actions.intent.SIGN_IN`.

| JSON representation ||
|---|---|
| ``` { "optContext": string } ``` |

| Fields ||
|---|---|
| `optContext` | `string` The optional context why the app needs to ask the user to sign in, as a prefix of a prompt for user consent, e.g. "To track your exercise", or "To check your account balance". |