I am working on slack bot that has access to a team's slack and trello workspace both. The bot needs to make a connection between slack member ids and trello member ids. The members may have their names different in each platform, the only matching attribute is their mail id. However, I can't fetch each member's email id from trello api calls. The documentation has a hint that it's probably not possible. In that case, is there any other solution? using python library 'trello' and 'slackclient' for making api calls in trello and slack respectively.