Password reset function implemented in AWS Cloud 9 does not work in heroku

2020-06-19T04:22:54.566364 + 00:00 app [web.1]:F, [2020-06-19T04:22:54.566307#4]FATAL--:[18842aaf-91d3-45d6-be88-85d52aea211f]
2020-06-19T04:22:54.566502 + 00:00 app [web.1]:F, [2020-06-19T04:22:54.566452#4]FATAL --:[18842aaf-91d3-45d6-be88-85d52aea211f] NoMethodError(undefined method`reset_digest='for#<User:0x0000555861fa7030>
2020-06-19T04:22:54.566503 + 00:00 app [web.1]: Did you mean?reset_token=):
2020-06-19T04:22:54.566542 + 00:00 app [web.1]:F, [2020-06-19T04:22:54.566499#4]FATAL --:[18842aaf-91d3-45d6-be88-85d52aea211f]
2020-06-19T04:22:54.566584+00:00 app [web.1]:F, [2020-06-19T04:22:54.566545#4]FATAL --:[18842aaf-91d3-45d6-be88-85d52aea211f] app/models/user.rb:20:in`create_reset_digest'
2020-06-19T04:22:54.566584 + 00:00 app [web.1]: [18842aaf-91d3-45d6-be88-85d52aea211f] app/controllers/password_resets_controller.rb:12:in`create'
2020-06-19T04:22:54.5658553 + 00:00 heroku [router]: at=info method=POST path="/password_resets" host=randomtag.herokuapp.com request_id=18842, aaf-91d3-45d6-be88-85d52aea211f fwd="69.118.84.101" dyno=1 connect=1svice=32

#Set password reset attributes
  def create_reset_digest
    self.reset_token=User.new_token
    update_columns(reset_digest:User.digest(reset_token),reset_sent_at:Time.zone.now)
  end

class PasswordResetsController<ApplicationController

  before_action: get_user, only: [:edit,:update]
  before_action:valid_user, only: [:edit,:update]
  before_action: check_expiration, only: [:edit,:update] 

  def new
  end

  def create
    @user=User.find_by (email:params[:password_reset][:email].downcase)
    if@user
      @user.create_reset_digest
      @user.send_password_reset_email
      flash[:info] = "Email sent with password reset instructions"
      redirect_to root_url
    else
      flash.now [:danger] = "Email address not found"
      render 'new'
    end
  end

  default
  end

  default update
    if params [:user] [:password].empty?
      @user.errors.add(:password,:blank)
      render 'edit'
    [email protected]_attributes(user_params)
      log_in@user
      @user.update_attribute(:reset_digest,nil)
      flash[:success] = "Password has been reset."
      redirect_to@user
    else
      render 'edit'
    end
  end

  private

    def user_params
      param.require(:user).permit(:password,:password_confirmation)
    end

    default_user
      @user=User.find_by (email:params[:email])
    end

    # verify the correct user
    default_user
      unless(@user&@user.activated?&
              @user.authenticated?(:reset,params[:id]))
        redirect_to root_url
      end
    end

        # check if a token has expired
    def check_expiration
      [email protected] ssword_reset_expired?
        flash [:danger] = "Password reset has expired."
        redirect_to new_password_reset_url
      end
    end
end

class User<ApplicationRecord  
attr_accessor:remember_token,:activation_token,:reset_token  
before_save —downcase_email  


before_save {self.email.downcase!}  
values:name,presence:true,length:{maximum:50}  
values:email, presence:true, length:{maximum:255},  
format: {with:/\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i},  
unity: {case_sensitive:false}  


has_secure_password  
has_many:hashtags, dependent::destroy  


# set password reset attributes  
def create_reset_digest  
self.reset_token=User.new_token  
update_columns(reset_digest:User.digest(reset_token),reset_sent_at:Time.zone.now)  
end  

# send a password reset e-mail  
def send_password_reset_email  
UserMailer.password_reset(self).deliver_now  
end  

class<<self  
# return the hash value of a passed string  
def digest (string)  
cost=ActiveModel::SecurePassword.min_cost?BCrypt::Engine::MIN_COST:  
BCrypt::Engine.cost  
BCrypt::Password.create(string, cost:cost)  
end  

# return a random token  
def new_token  
SecureRandom.urlsafe_base64  
end  
end  

# Returns true if password reset has expired  
def password_reset_expired?  
reset_sent_at<2.hours.ago  
end  

private  

# lowercase all e-mail addresses  
def downcase_email  
self.email=email.downcase  
end  

# Create and replace activation tokens and digests  
def create_activation_digest  
self.activation_token=User.new_token  
self.activation_digest=User.digest(activation_token)  
end  
end