Rails: List of users who upvoted - ruby-on-rails

Question

In my rails application I have an upvote system, it allows people to upvote a pin. Then when a user upvoted a pin I render a list of upvoted pins in the user profile. What I want to do know is to provide a list of the users who upvoted a specific pin.
app/controller/pins_controller.rb
def upvote
#pin = Pin.find(params[:id])
if #pin.votes.create(user_id: current_user.id)
flash[:notice] = "Thank you for upvoting! You can upvote a startup only once."
redirect_to(pins_path)
else
flash[:notice] = "You have already upvoted this!"
redirect_to(pins_path)
end
end
app/controller/users_controller.rb
def show
#user = User.find(params[:id])
#pins_for_user = []
#user.votes.each do |vote|
#pins_for_user << vote.pin
end
end
app/models/pin.rb
class Pin < ActiveRecord::Base
belongs_to :user
has_many :votes, dependent: :destroy
has_many :upvoted_users, through: :votes, source: :user
has_many :rewards, dependent: :destroy
has_many :rewarded_users, through: :rewards, source: :user
has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }
has_attached_file :logo, :styles => { :medium => "300x300>", :thumb => "100x100>" }
end
app/models/user.rb
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :pins
has_many :votes, dependent: :destroy
has_many :upvoted_pins, through: :votes, source: :pin
has_many :rewards, dependent: :destroy
has_many :rewarded_pins, through: :rewards, source: :pin
end
app/models/vote.rb
class Vote < ActiveRecord::Base
belongs_to :user
belongs_to :pin, counter_cache: true
validates_uniqueness_of :pin_id, scope: :user_id
end
I was thinking of using #pin.upvoted_users to provide this list but I didn't succeeded to implement it correctly, any ideas?