Update user_cas_omniauth_authorize_path request to be post

Co-authored-by: Jane Sandberg <[email protected]>

spec/requests/users_request_spec.rb

@@ -33,14 +33,15 @@
         )
         allow(User).to receive(:from_omniauth).and_return(user)
 
-        get user_cas_omniauth_authorize_path
+        post user_cas_omniauth_authorize_path
       end
 
       after do
         logout
       end
 
       it 'builds the callback from the CAS endpoint response' do
+
         expect(response.status).to eq(302)
         expect(response.headers['Location']).to include(Rails.application.config.cas.url)