Add Google Identity Platform support

[realchrisolin]

We already support Facebook and Strava to register/login. Let's add Google!

[sethherr]

Pull request!?

[realchrisolin]

It's coming. I opened an issue so there's something trackable.

[sethherr]

:+1: :smile:

[realchrisolin]

I lost what little work I had done on this when Blackboard gave me the boot. Gonna give it another go, using the Strava integration as a sort of template since I have no idea what I'm doing (any advice would be awesome).

app/assets/stylesheets/revised/sections/sign_in_up.scss:    .strava-login {
app/assets/stylesheets/revised/sections/sign_in_up.scss:      @include oauth-login-bar($strava-login-color);
app/models/integration.rb:    if provider_name == 'facebook' || provider_name == 'strava'
app/views/sessions/new.html.haml:          %a.strava-login{ href: '/auth/strava' }
app/views/sessions/new.html.haml:              = image_tag 'revised/strava_login.svg'
app/views/users/new.html.haml:          %a.strava-login{ href: '/auth/strava' }
app/views/users/new.html.haml:              = image_tag 'revised/strava_login.svg'
config/initializers/omniauth.rb:  provider :strava, ENV['STRAVA_KEY'], ENV['STRAVA_SECRET'], scope: 'public'
Gemfile:gem 'omniauth-strava'
Gemfile.lock:    omniauth-strava (0.0.6)
Gemfile.lock:  omniauth-strava
spec/fixtures/integration_data_strava.json:  "provider": "strava",
spec/models/integration_spec.rb:  let(:strava_file) { File.read(Rails.root.join('spec', 'fixtures', 'integration_data_strava.json')) }
spec/models/integration_spec.rb:    context 'strava integration' do
spec/models/integration_spec.rb:      let(:info) { JSON.parse(strava_file) }

[realchrisolin]

Commenting for later.

https://cloud.google.com/ruby/getting-started/authenticate-users https://github.com/zquestz/omniauth-google-oauth2