code: public SshKey getSshKey(Integer keyId) throws GitLabApiException {
          Response response = get(Response.Status.OK, null, "user", "keys", keyId);
          return (response.readEntity(SshKey.class));
      }
docs: Get a single SSH Key.
  
  <pre><code>GitLab Endpoint: GET /user/keys/:key_id</code></pre>
  
  @param keyId the ID of the SSH key.
  @return an SshKey instance holding the info on the SSH key specified by keyId
  @throws GitLabApiException if any exception occurs