FEATURE: new API to search for a user by email

lib/admin_user_index_query.rb

@@ -114,6 +114,10 @@ def filter_by_user_with_bypass(filter)
  end

  def filter_by_search
    if params[:email].present?
      return @query.where('user_emails.email = ?', params[:email].downcase)
    end

    filter = params[:filter]
    if filter.present?
      filter.strip!

spec/components/admin_user_index_query_spec.rb

@@ -188,6 +188,20 @@ def real_users_count(query)

        expect(query.to_sql.downcase).not_to include("ilike")
      end

      it "can correctly bypass expensive ilike query" do
        user = Fabricate(:user, email: 'sam2@Sam.com')

        query = AdminUserIndexQuery.new(email: 'Sam@sam.com').find_users_query
        expect(query.count).to eq(0)
        expect(query.to_sql.downcase).not_to include("ilike")

        query = AdminUserIndexQuery.new(email: 'Sam2@sam.com').find_users_query
        expect(query.first.id).to eq(user.id)
        expect(query.count).to eq(1)
        expect(query.to_sql.downcase).not_to include("ilike")

      end
    end

    context "by email fragment" do