<!--
If this is a feature request, make sure you search Issues for an existing request before creating a new one!

Please utilize the template below to help us resolve your issue.

Note that many issues can be resolved by updating to the latest version.
-->

### Issue Summary
A summary of the issue and the environment in which it occurs. If suitable, include the steps required to reproduce the bug. Please feel free to include screenshots, screencasts, or code examples.

### Steps to Reproduce
1. This is the first step
2. This is the second step
3. Further steps, etc.

### Code Snippet
```php
# paste code here
```

### Exception/Log
```
# paste exception/log here
```

### Technical details:
* sendgrid-php version: 
* php version: