NoMethodError in Devise::Registrations#new

I keep getting this error when I try to sign up on my application, I am using devise for authentication;

    NoMethodError in Devise::Registrations#new


undefined method `registration_path' for #<#<Class:0x007fe45c6c35e8>:0x007fe45d9ffd78>
Extracted source (around line #3):

  <h2>Sign up</h2>

  <%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
    <%= devise_error_messages! %>

    <div><%= f.label :email %><br />

When I run rake routes I get;

                  Prefix Verb   URI Pattern                    Controller#Action
        new_user_session GET    /users/sign_in(.:format)       devise/sessions#new
            user_session POST   /users/sign_in(.:format)       devise/sessions#create
    destroy_user_session DELETE /users/sign_out(.:format)      devise/sessions#destroy
           user_password POST   /users/password(.:format)      devise/passwords#create
       new_user_password GET    /users/password/new(.:format)  devise/passwords#new
      edit_user_password GET    /users/password/edit(.:format) devise/passwords#edit
                         PATCH  /users/password(.:format)      devise/passwords#update
                         PUT    /users/password(.:format)      devise/passwords#update
cancel_user_registration GET    /users/cancel(.:format)        devise/registrations#cancel
       user_registration POST   /users(.:format)               devise/registrations#create
   new_user_registration GET    /users/sign_up(.:format)       devise/registrations#new
  edit_user_registration GET    /users/edit(.:format)          devise/registrations#edit
                         PATCH  /users(.:format)               devise/registrations#update
                         PUT    /users(.:format)               devise/registrations#update
                         DELETE /users(.:format)               devise/registrations#destroy

Sign up link code;

<%= link_to "Sign up", new_user_registration_path%>

UPDATE Thanks to ParaPenguin the sign up field works now, but when I click submit I keep getting this problem

No route matches [POST] "/users/sign_up"

    new_user_session_path    GET     /users/sign_in(.:format)    devise/sessions#new
user_session_path    POST    /users/sign_in(.:format)    devise/sessions#create
destroy_user_session_path    DELETE  /users/sign_out(.:format)   devise/sessions#destroy
user_password_path   POST    /users/password(.:format)   devise/passwords#create
new_user_password_path   GET     /users/password/new(.:format)   devise/passwords#new
edit_user_password_path  GET     /users/password/edit(.:format)  devise/passwords#edit
PATCH    /users/password(.:format)   devise/passwords#update
PUT  /users/password(.:format)   devise/passwords#update
cancel_user_registration_path    GET     /users/cancel(.:format)     devise/registrations#cancel
user_registration_path   POST    /users(.:format)    devise/registrations#create
new_user_registration_path   GET     /users/sign_up(.:format)    devise/registrations#new
edit_user_registration_path  GET     /users/edit(.:format)   devise/registrations#edit
PATCH    /users(.:format)    devise/registrations#update
PUT  /users(.:format)    devise/registrations#update
DELETE   /users(.:format)   

Update 2-Gjaldon asked me to include my user model and routes My user model

    class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
end

Routes.rb

Document::Application.routes.draw do
  devise_for :users
   root "pages#home"
  get "about" => "pages#about"
   get "prices" => "pages#prices"
  get "faq" => "pages#faq", :as => :faq
  get "terms" => "pages#terms"
  get "view" => "pages#view"
  get "policy" => "pages#policy"
  get "contact" => "pages#contact"
  get "works" => "pages#works"