rails authentication for an API
<server>/users/connect

def connect
  user = User.find_by_email(params[:email])
  password = params[:password]
  # here is the part I'm pseudo coding out
  if user.is_valid_password(password)
    ...do my stuff...
  end

  render :json ...etc...
end

config.token_authentication_key = :nameofyourapikeyhere

devise … token_authenticatable, ...