added many to many betweer beers and users

app/models/beer.rb

@@ -3,6 +3,7 @@ class Beer < ApplicationRecord
 
   belongs_to :brewery
   has_many :ratings, dependent: :destroy
+  has_many :users, through: :ratings
 
   validates :name, presence: true
 

app/models/user.rb

@@ -4,4 +4,5 @@ class User < ApplicationRecord
   validates :username, uniqueness: true, length: { minimum: 3, maximum: 30 }
 
   has_many :ratings
+  has_many :beers, through: :ratings
 end