def authorize_url(provider, params=nil)
      connection.build_url(options[:authorize_url].sub(/:provider/, provider),
                           params).to_s
    end
def authorize_url(provider, params=nil)
      connection.build_url(options[:authorize_url].sub(/:provider/, provider),
                           params).to_s
    end
The authorize endpoint URL of the OAuth2 provider

 @param [Hash] params additional query parameters