"Who're Are the users" 6/8

#1

Just curios. on the below, why does calling the first 2 work, but the 3rd does not. Do you always have to pass through the "initialization" method when calling a method in a class?

WORKS
my_computer.create("TEST 1")

WORKS
Computer.new("test", 123).create("TEST 2")

DOESNT WORK
Computer.create("TEST 3")

class Computer
    @@users = {}
    
    def initialize (username, password)
        
        @username = username
        @password = password
        @files = {}  
        @@users[username] = password
        
end

    def create (filename)
        time = Time.now
        @files[filename] = time
        
        puts "Created #{filename} at #{time}"
end

    def Computer.get_users
        return @@users
    end
end

my_computer = Computer.new("Tr", 123)
#2

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