```ruby
require_dependency 'stash_engine/application_controller'

module StashEngine
  class SessionsController < ApplicationController
    skip_before_action :verify_authenticity_token, only: [:callback]

    def index
    end

    # this is the place omniauth calls back when logging in
    def callback
      @auth_hash = request.env['omniauth.auth']
      reset_session
      if @auth_hash && @auth_hash['info'] && @auth_hash['info']['email'] && @auth_hash['uid']
        session[:test_domain] = @auth_hash['info']['test_domain'] if @auth_hash[:provider] == 'developer'
        logger.debug(@auth_hash.inspect)
        user = User.from_omniauth(@auth_hash, current_tenant.abbreviation)
        session[:user_id] = user.id
        redirect_to dashboard_path
      else
        return head(:forbidden)
      end
    end

    # destroy the session (ie, log out)
    def destroy
      reset_session
      redirect_to root_path
    end

    private

    def set_session
      session.merge!(email:    @auth_hash['info']['email'],
                     name:     @auth_hash['info']['name'],
                     provider: @auth_hash['provider'])
      session[:test_domain] = @auth_hash['info']['test_domain'] if session[:provider] == 'developer'
    end

  end
end
```

Fix for developer login not setting tenant correctly for testing.
user
```ruby
require_dependency 'stash_engine/application_controller'

module StashEngine
  class SessionsController < ApplicationController
    skip_before_action :verify_authenticity_token, only: [:callback]

    def index
    end

    # this is the place omniauth calls back when logging in
    def callback
      @auth_hash = request.env['omniauth.auth']
      reset_session
      if @auth_hash && @auth_hash['info'] && @auth_hash['info']['email'] && @auth_hash['uid']
        session[:test_domain] = @auth_hash['info']['test_domain'] if @auth_hash[:provider] == 'developer'
        logger.debug(@auth_hash.inspect)
        user = User.from_omniauth(@auth_hash, current_tenant.abbreviation)
        session[:user_id] = user.id
        redirect_to dashboard_path
      else
        return head(:forbidden)
      end
    end

    # destroy the session (ie, log out)
    def destroy
      test_domain = session[:test_domain]
      reset_session
      session[:test_domain] = test_domain
      redirect_to root_path
    end

    private

    def set_session
      session.merge!(email:    @auth_hash['info']['email'],
                     name:     @auth_hash['info']['name'],
                     provider: @auth_hash['provider'])
      session[:test_domain] = @auth_hash['info']['test_domain'] if session[:provider] == 'developer'
    end

  end
end
```
assistant