The function checks if a user is in a group. Argument user_name can also be a comma-separated list of user names, group names or role names. In that case, the function will return  only if all users in the list, groups of the list, and in the roles of the list, are in the group in the second argument.

isInGroup(text user_name, text group_name) #Output: Boolean

Parameters used in this function

The function returns a