code: function executeCommand(parameters) {
      const configFilePath = path.join(process.cwd(), plugin.config.policiesPath);
      return mkdirpAsync(configFilePath)
      .then(() => {
        // We create the configuration file of the Lambda
        const document = {
          Version: '2012-10-17',
          Statement: [{
            Effect: 'Deny',
            Action: ['*'],
            Resource: ['*']
          }]
        };
  
        // We save the specification in a json file
        return fs.writeFileAsync(configFilePath + path.sep + parameters.identifier + '.json', JSON.stringify(document, null, 2));
      })
      .then(() => {
        const msg = '\n  The IAM policy ' + icli.format.info(parameters.identifier)
                  + ' has been created in ' + icli.format.info(configFilePath + path.sep + parameters.identifier + '.json') + '\n\n';
        icli.print(msg);
      });
    }
docs: Create the new policy
  @param {Object} parameters - the parameters provided in the command and in the prompt
  @returns {Promise<null>} - The execution stops here