code: public static DropboxClient build(String appKey, String appSecret, String token, String secret) {
          Preconditions.checkNotNull(token, "Token cannot be null");
          Preconditions.checkNotNull(secret, "Secret cannot be null");
  
          DropboxClientBuilder builder = new DropboxClientBuilder(appKey, appSecret);
          builder.accessToken = new Token(token, secret);
  
          return builder.buildDropboxClient();
      }
docs: Build ready to use DropboxClient with specified appKey and appSecret
  with specified access token (without authenticator).
  
  @param appKey    application key
  @param appSecret application secret
  @param token     part of access token
  @param secret    part of access token
  
  @return ready to use dropbox client
  
  @see DropboxClient