by Hiren Bhut.
I am also try this external database authentication but i am login register user at time display error message invalid user name and password.
i need to help how many field it is required external database or required all field in external db?
you are also check my configuration in attachment image
I need to help for step by step solution of the external database configuration or help SSO between moodle and Yii
check my configuration external db in attachment
please help me