Activate a feature for a user
feature_flags_put_users(flag_name, user_id)
A list containing the following elements:
string, The name of the feature.
string,
boolean, Whether the feature is active for the current user.
integer, The number of users with this feature flag enabled.
string,
string,
string,
integer,
integer,
integer, The target percentage of users who should have this feature flag enabled.
string required. The feature name.
integer required. The user ID.