[Rails] password encryption is not working..

[uma ya]

I am using require 'digest/sha1' to encrypt my password and save into
database. During login it is showing the following error-

undefined local variable or method `encrypted_password' for
#<Signin:0x992c990

code:

before_save :encrypt_password

def has_password?(submitted_password)
  encrypted_password == encrypt(submitted_password)
end

  private

     def encrypt_password
       self.salt = make_salt unless has_password?(password)
       self.encrypted_password = encrypt(password)
     end

     def encrypt(string)
       secure_hash("#{salt}--#{string}")
     end

     def make_salt
       secure_hash("#{Time.now.utc}--#{password}")
     end

     def secure_hash(string)
       Digest::SHA2.hexdigest(string)
     end



Please help me dis !

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