Check SMC API connectivity

The following steps provide information on how to check SMC API connectivity:

In the folder where fp-ngfw-aws-TransitGateway-autoscaling.zip was unpacked, run the following command:
```
chmod +x ApiTest
```
Check whether config.json and smc.pem are configured correctly.
Run the ApiTest with the following command:
```
./ApiTest
```
The following message is displayed if the SMC API is reached successfully:
```
Your API Client: 'smc-api-client' can be reached
```