Like any Oauth testing/setup, it's much easier with a Moodle site that has a public FQDN.  It's hard to test with dev boxes that don't have a "proper" publicly accessible URL. Alternatively, use ngrok To use ngrok in console run curl -s https: //ngrok-agent.s3.amazonaws.com/ngrok.asc | sudo tee /etc/apt/trusted.gpg.d/ngrok.asc >/dev/null && echo "deb https://ngrok-agent.s3.amazonaws.com buster main" | sudo tee /etc/apt/sources.list.d/ngrok.list && sudo apt update && sudo apt install ngrok Start ngrok with ngrok http 80 Copy a link that will be redirected to localhost - looks like https: //0423-94-43-143-216.eu.ngrok.io Edit config.php and replace url in wwwroot. So http://localhost/m/integration_master becomes smth like https://0423-94-43-143-216.eu.ngrok.io/m/integration_master Add this line to use https: $CFG->sslproxy = 1 ; Enable OAuth2 authentication plugin (Site administration > plugins > manage authentication) Set up an OAuth2 issuer Setting up OAuth2 can be tricky, it is recommended to review the documentation here: https://docs.moodle.org/311/en/OAuth_2_services Create a client ID and secrtet in Google developer console, using the guide here: https://docs.moodle.org/311/en/OAuth_2_Google_service - you will need a Google account for that Create Google service at admin/tool/oauth2/issuers.php using client ID and secret from previous step When setting up the Google service unselect the "Require email validation" checkbox. (This makes testing steps easier) Log out as the administrator Log in with an Google test account. Confirm that the user has logged in successfully. In a vanilla Moodle install there is no way to view the raw data raised by an event, you need to check the logstore data directly in the database. Access the Moodle instance database (using psql cli etc) Run the following SQL statement: SELECT other FROM mdl_logstore_standard_log mls JOIN mdl_user mu ON mu.id = mls.userid WHERE action = 'loggedin' AND auth = 'oauth2' ; Confirm the `other' db field contains JSON with an extrauserinfo values.  { "username" : "mattp" , "extrauserinfo" :{ "sub" : "5tqhcY" , "name" : "mattp" , "family_name" : "Porritt" , "given_name" : "Matthew" , "" email ":" hmm_fake @gmail .com"}}