1. A method performed in a computer system for aiding assessment of an influence of a user in or interacting with a communication system by applying social network analysis (SNA) functions, the method comprising: obtaining two or more SNA metrics for each user of a first number of users, each SNA metric being determined by a respective SNA function, calculating a weight parameter for each one of the SNA metrics using a machine learning method, the weight parameters indicating a combination of the SNA metrics for use in the assessment of the influence of the user, and applying the weight parameters calculated from the SNA metrics of the first number of users to SNA metrics of a second number of users to assess a ranking in accordance with influence of users in the second number of users.