code: public function registerAccount($name, $accountName, $accountKey, $streamName = false)
      {
          if ( isset($this->accounts[$name])) {
              throw new \RuntimeException("An account with name $name is already registered.");
          }
  
          $this->accounts[$name] = new BlobClient(
              sprintf('https://%s.blob.core.windows.net', $accountName),
              $accountName,
              $accountKey
          );
  
          if (! $streamName) {
              return;
          }
  
          $this->accounts[$name]->registerStreamWrapper($streamName);
      }
docs: Register Account
  
  @param string $name
  @param string $accountName
  @param string $accountKey
  @param string $streamName
  @return void