code: def start_auth(self, context, internal_req):
          
  
          target_entity_id = context.get_decoration(Context.KEY_TARGET_ENTITYID)
          if target_entity_id:
              entity_id = target_entity_id
              return self.authn_request(context, entity_id)
  
          # if there is only one IdP in the metadata, bypass the discovery service
          idps = self.sp.metadata.identity_providers()
          if len(idps) == 1 and "mdq" not in self.config["sp_config"]["metadata"]:
              entity_id = idps[0]
              return self.authn_request(context, entity_id)
  
          return self.disco_query()
docs: See super class method satosa.backends.base.BackendModule#start_auth
          :type context: satosa.context.Context
          :type internal_req: satosa.internal.InternalData
          :rtype: satosa.response.Response