export SENDGRID_USERNAME=<my SendGrid account's user name>
export SENDGRID_PASSWORD=<my SendGrid account's password>

development:
  email_provider_username: <%= ENV["SENDGRID_USERNAME"] %>
  email_provider_password: <%= ENV["SENDGRID_PASSWORD"] %>
  ...

# Configure ActionMailer SMTP settings for SendGrid
  config.action_mailer.smtp_settings = {
    ...
    user_name: Rails.application.secrets.email_provider_username,
    password: Rails.application.secrets.email_provider_password
  }

def create
    @contact = Contact.new(secure_params)
    if @contact.valid?
      UserMailer.contact_email(@contact).deliver_now
      flash[:notice] = "Message sent from #{@contact.name}."
      redirect_to root_path
    else
      render :new
    end
  end

echo $SENDGRID_USERNAME
echo $SENDGRID_PASSWORD