getKey() public method

Gets key
public getKey ( ) : string
return string Key
 /**
  * Sign request
  *
  * @param  RequestInterface     $request     Request
  * @param  CredentialsInterface $credentials Credentials
  * @return void
  */
 public function signRequest(OutgoingRequestInterface $request, CredentialsInterface $credentials)
 {
     $request->addParam('key', $credentials->getKey());
     $request->addParam('timestamp', $this->getTimestamp());
     $request->addParam('cnonce', $this->keyGenerator->generateNonce());
     $signature = $this->signature->createSignature($request, $credentials);
     $request->addParam('signature', $signature);
 }