This method retrieves all the subscriptions applying some filters:
* Filtering out by [[SubscriptionPurchaseType]] = Top-down (Returning only subscriptions with SubscriptionPurchaseType '''Api-Only''' or '''Both''')
* Filtering out by UserType (Depending if is Anonymous, Tef-User, Non-Tef-User)
* Filtering out by the type of device the user is logged on (Depending if is OTT, IPTV or Hybrid)
* Filters them depending on the typeFilter parameter provided (see [[SubscriptionType]]). If no typeFilter is provided, this method returns all the subscriptions.