AccessKeyValidationPreprocessor provides preprocess method to check the API key of the request.

InjectAuth preprocessor checks the auth_id in the request and get the auth object from the database.

InjectUser injects a user record to the payload An AuthInfo must be injected before this, if it is not found, the preprocessor would just skip the injection If AuthInfo is injected but a user record is not found, the preprocessor would create a new user record and inject it to the payload.

UserAuthenticator provides preprocess method to authenicate a user with access token or non-login user without api key.