{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/microsoft.graph.userSignIn", "title": "microsoft.graph.userSignIn", "allOf": [ { "$ref": "#/components/schemas/microsoft.graph.signInIdentity" }, { "title": "userSignIn", "required": [ "@odata.type" ], "type": "object", "properties": { "externalTenantId": { "type": "string", "description": "TenantId of the guest user as applies to Microsoft Entra B2B scenarios.", "nullable": true }, "externalUserType": { "$ref": "#/components/schemas/microsoft.graph.conditionalAccessGuestOrExternalUserTypes" }, "userId": { "type": "string", "description": "Object ID of the user.", "nullable": true }, "@odata.type": { "type": "string", "default": "#microsoft.graph.userSignIn" } } } ], "x-ms-discriminator-value": "#microsoft.graph.userSignIn" }