code: @SuppressWarnings("unused")
      public void setBasicAuth(@Nullable String username, @Nullable String password) {
          mUsername = username;
          mPassword = password;
      }
docs: <p>
  Set credentials for this HttpSender that override (if present) the ones set globally.
  </p>
  
  @param username The username to set for HTTP Basic Auth.
  @param password The password to set for HTTP Basic Auth.