how to make randomised teams in ue4

so i am make an online recreations of a game named secret hitler a board game but it requires 3 teams one for hitler only one person one for fascist 1-3 people and the rest are liberal 3-6 and i cant figure out to order the teams so that 1 person is hitler without getting mixes of random players does anyone know how to do this

Thank you
(it uses the plugin advanced sessions and is online multiplayer only)