fix(parser): make identitySource optional for ApiGatewayAuthorizerRequestV2 model (#5880)

fix(parser): identitySource is optional for ApiGatewayAuthorizerRequestV2

Co-authored-by: Leandro Damascena <lcdama@amazon.pt>

Author: anafalcao

aws_lambda_powertools/utilities/parser/models/apigwv2.py

@@ -72,4 +72,4 @@ class APIGatewayProxyEventV2Model(BaseModel):
 class ApiGatewayAuthorizerRequestV2(APIGatewayProxyEventV2Model):
     type: Literal["REQUEST"]
     routeArn: str
-    identitySource: List[str]
+    identitySource: Optional[List[str]] = None

tests/unit/parser/_pydantic/test_apigwv2.py

@@ -130,3 +130,12 @@ def test_apigw_v2_request_authorizer():
     assert parsed_event.type == raw_event["type"]
     assert parsed_event.identitySource == raw_event["identitySource"]
     assert parsed_event.routeArn == raw_event["routeArn"]
+
+
+def test_apigw_v2_request_authorizer_without_identity_source():
+    raw_event = load_event("apiGatewayAuthorizerV2Event.json")
+    raw_event["identitySource"] = None
+
+    parsed_event: ApiGatewayAuthorizerRequestV2 = ApiGatewayAuthorizerRequestV2(**raw_event)
+
+    assert parsed_event.identitySource == raw_event["identitySource"]