Console log

Started PATCH "/users/28/edit" for 192.168.0.100 at 2016-09-23 22:40:26 +0200
Processing by UsersController#edit as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"BILLq+y8oXYL6aECCZCPONCAalsaKMYfZWFB50J3kNRQCSdt1Fy+X17fExIXML0bi5p00mH07lXXJNKOecytjA==", "user"=>{"name"=>"Name Update", "email"=>"[email protected]", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "button"=>"", "id"=>"28"}
  User Load (0.2ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 28], ["LIMIT", 1]]
  Rendering users/edit.html.erb within layouts/application
  Rendered shared/_errors.html.erb (0.4ms)
  Rendered users/edit.html.erb within layouts/application (3.6ms)
  Rendered application/_favicon.html.erb (8.4ms)
  User Load (0.4ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 28], ["LIMIT", 1]]
  Rendered layouts/_header.html.erb (3.6ms)
  Rendered layouts/_flash_messages.html.erb (0.3ms)
  Rendered cookies_eu/_cookies_eu.html.erb (0.4ms)
  Rendered layouts/_footer.html.erb (1.1ms)
Completed 200 OK in 71ms (Views: 69.2ms | ActiveRecord: 0.6ms)

edit.html.erb

<%= render "shared/errors", object: @user %>
<h2 class="ui center aligned icon header">
  <i class="circular user icon"></i>
  Edit User
</h2>
<%= form_for @user do |f| %>
<div class="ui form ui raised segment">
  <h4 class="ui dividing header">Personal Information</h4>
  <div class="two fields">
    <div class="field">
      <%= f.label :name, 'Full name' %>
      <%= f.text_field :name, autofocus: true %>
    </div>
    <div class="field">
      <label for="txtPosition">Account valid to</label>
      <input type="text" placeholder="September 18, 2017" readonly="">
    </div>
  </div>
  <h4 class="ui dividing header">Contact Information</h4>
  <div class="field">
    <%= f.label :email %>
    <%= f.email_field :email %>
  </div>
  <h4 class="ui dividing header">Password</h4>
  <div class="two fields">
    <div class="field">
      <%= f.label :password %>
      <%= f.password_field :password, autocomplete: 'off' %>
    </div>
    <div class="field">
      <%= f.label :password_confirmation %>
      <%= f.password_field :password_confirmation, autocomplete: 'off' %>
    </div>
  </div>
  <h4 class="ui dividing header">Delete Account</h4>
  <div class="field">
    <%= link_to @user,
                  data: { confirm: 'This will delete this account! Are you sure?' },
                  method: :delete,
                  class: 'negative ui basic button' do %>
        <i class="trash icon"></i>Delete Account
    <% end %>
  </div>
</div>
<%= f.button :submit, class: 'ui right floated labeled icon basic positive button' do %>
        <i class="save icon"></i>Update
        <% end %>
<% end %>


<%= link_to 'Back', users_path %>

routes.rb

Rails.application.routes.draw do
  resources :messages
  devise_for :users, :controllers => { omniauth_callbacks: 'omniauth_callbacks', registrations: 'registrations' }
  resources :analyses
  resources :daily_overviews
  root 'static_pages#home'
  match '/users/:id/finish_signup' => 'users#finish_signup', via: [:get, :patch], :as => :finish_signup
  get '/users/' => 'users#index'

  namespace :admin do
    resources :users
  end
end

users_controller.rb

# app/controllers/admin/users_controller.rb

class Admin::UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy, :finish_signup]

  def show
  end

  def index
    @users = User.all
  end

  def edit
  end

  def update
      if @user.update(user_params)
        redirect_to @user, notice: 'Profile was successfully updated.'
      else
        render :edit
      end
  end

  def finish_signup
    if request.patch? && params[:user] #&& params[:user][:email]
      if @user.update(user_params)
        @user.skip_reconfirmation!
        bypass_sign_in(@user)
        redirect_to @user, notice: 'Your profile was successfully updated.'
      else
        @show_errors = true
      end
    end
  end

  def destroy
    @user.destroy
    redirect_to root_url
  end

  private
  def set_user
    @user = User.find(params[:id])
  end

  def user_params
    params.require(:user).permit(:name, :email, :password, :password_confirmation)
  end
end