code: function pwCipher(string) {
  
          if(string) {
  
              if ( typeof pw !== 'string' || pw.length < 8 ) {
                  throw new Error('Please set a password with 8 or ' +
                      'more chars on process.env.CIPHER_UTIL_PW!');
              }
  
              if ( typeof algo !== 'string' || algo.length < 1 ) {
                  throw new Error('Please choose an algorithm' +
                      ' on process.env.CIPHER_UTIL_ALGO!');
              }
  
              var ciphered = crypto.createCipher(algo, pw),
  
              /*
               * Array
               */
              encrypted = [ciphered.update(string)];
  
              encrypted.push(ciphered.final());
  
              return Buffer.concat(encrypted).toString(pwEnc);
  
          }
  
          return null;
  
      }
docs: Encrypt string with password and specified algorithm.
  
  @param string {String} String to encrypt.
  @return {String | Null}