parameters: (self, following, follower)
docstring: Adds the id of follower to the recipients of followed profile's entries.
docstring_summary: Adds the id of follower to the recipients of followed profile's entries.
docstring_tokens: Adds the id of follower to the recipients of followed profile s entries .
function: def add_to_recipients(self, following, follower):
          """
          Adds the id of follower to the recipients of followed profile's entries.
          """
          self.collection.update(
              {"sender.username": following.username},
              {"$push": {"recipients": follower.id}}, multi=True)
function_tokens: def add_to_recipients ( self , following , follower ) : self . collection . update ( { "sender.username" : following . username } , { "$push" : { "recipients" : follower . id } } , multi = True )