code: public N1qlParams withCredentials(List<Credential> credentials) {
          for (Credential credential : credentials) {
              withCredentials(credential.login(), credential.password());
          }
          return this;
      }
docs: Allows to add a list of credentials (in the form of {@link Credential} objects) to this
  request. Credentials for usernames that were previously set by a similar call are replaced.
  
  @param credentials the list of credentials to add to the request.
  @return this {@link N1qlParams} for chaining.