code: public void clearAll() {
          this.auths.clear();
          this.authsByUser.clear();
          File[] auths = this.authStoreDir.listFiles(new AuthFilenameFilter());
          for (int i = 0; i < auths.length; i++) {
              auths[i].delete();
          }
      }
docs: /*
  (non-Javadoc)
  
  @see com.flickr4java.flickr.util.AuthStore#clearAll()