Added direct Lambda invoke documentation

content/en/user-guide/aws/lambda/index.md

@@ -64,6 +64,16 @@ $ awslocal lambda create-function \
 In the old Lambda provider, you could create a function with any arbitrary string as the role, such as `r1`. However, the new provider requires the role ARN to be in the format `arn:aws:iam::000000000000:role/lambda-role` and validates it using an appropriate regex. However, it currently does not check whether the role exists.
 {{< /alert >}}
 
+### Invoke the Function with AWS CLI
+Invoke the function directly. See ['Lambda CLI invoke docs'](https://docs.aws.amazon.com/cli/latest/reference/lambda/invoke.html) 
+The command below encodes the body as a JSON string like an event coming from API Gateway or Lambda URL does.
+
+{{< command >}}
+$ awslocal lambda invoke --function-name localstack-lambda-url-example \
+	--cli-binary-format raw-in-base64-out \
+	--payload '{"body": "{\"num1\": \"10\", \"num2\": \"10\"}" }' output.txt
+{{< / command >}}
+
 ### Create a Function URL
 
 With the Function URL property, there is now a new way to call a Lambda Function via HTTP API call using the [`CreateFunctionURLConfig` API](https://docs.aws.amazon.com/lambda/latest/dg/API_CreateFunctionUrlConfig.html). To create a URL for invoking the function, run the following command: