module Restforce::Concerns::Authentication

def authenticate!

Public: Force an authentication 
def authenticate!
  raise AuthenticationError, 'No authentication middleware present' unless authentication_middleware
  middleware = authentication_middleware.new nil, self, options
  middleware.authenticate!
end

def authentication_middleware

Internal: Determines what middleware will be used based on the options provided 
def authentication_middleware
  if username_password?
    Restforce::Middleware::Authentication::Password
  elsif oauth_refresh?
    Restforce::Middleware::Authentication::Token
  end
end

def oauth_refresh?

authentication.
Internal: Returns true if oauth token refresh flow should be used for 
def oauth_refresh?
  options[:refresh_token] &&
    options[:client_id] &&
    options[:client_secret]
end

def username_password?

authentication.
Internal: Returns true if username/password (autonomous) flow should be used for 
def username_password?
  options[:username] &&
    options[:password] &&
    options[:client_id] &&
    options[:client_secret]
end