Add an authorized SSH key

**Note:** The request body for this operation must be submitted as `application/x-www-form-urlencoded` data. You can submit a parameter value as a string, or you can use a tool such as `curl` to submit a parameter value as the contents of a text file. For more information, see the [`curl` documentation](https://curl.se/docs/manpage.html#--data-urlencode).