code: function list(callback, limit, offset) {
    if(!util.isFunction(callback)) {
      throw new Error('callback must be a function');
    }
  
    var resource = this.coinjar.personal.api_endpoint + '/v1/transactions.json',
      query = {};
  
    if(limit) { query.limit = limit; }
    if(offset) { query.offset = offset; }
  
    request.get(resource)
      .auth(this.coinjar.personal.auth_token)
      .query(query)
      .end(function (response) {
        if(isResponseError(response, callback)) { return; }
        return callback(null, response.body.transactions);
      });
  }
docs: @name list
  @description
  All Transactions for user account.
  
  @params {Function} callback
  @params {String} limit
  @params {String} offset