Logging into Devise from a Rake Task - ruby-on-rails

Question

(Edit: this code actually works, the error was in my original code, which had an incorrect email address!)
I've figured out how to log into Devise from the console, however when I attempt to do the same from a rake task it gives me 401 unauthorised when posting to sign in. This is my rake task. (These same steps work in the console).
task :get_home => :environment do
app = ActionDispatch::Integration::Session.new Rails.application
app.get '/users/sign_in'
p csrf_token = app.session[:_csrf_token]
app.post '/users/sign_in',{:authenticity_token => csrf_token, :user => {:email => "example#example.com", :password => "password"}}
app.get ''
p csrf_token = app.session[:_csrf_token]
app.get '/users'
File.open("users", "w+") do |f|
f.write(app.response.body)
end
end

Answer 1

User error, I typed in the .con for the email instead of .com.
I must be tired, i double and triple checked the parameters and never noticed this... until an hour later. (i changed the actual email in my post, but in my code it was incorrect)

Answer 2

For newer versions of Rails this still needs parameters specified. This line will toss an error ArgumentError: unknown keywords: authenticity_token, user:
app.post '/users/sign_in',{:authenticity_token => csrf_token, :user => {:email => "example#example.com", :password => "password"}}
To rectify it just add parameters:
app.post '/users/sign_in',{:params => {:authenticity_token => csrf_token, :user => {:email => "example#example.com", :password => "password"}}}