Social auth for new users is not working

[dostalradim]

NetBox version

v3.3.6

Python version

3.10

Steps to Reproduce

I tested authentication against Keycloak with social auth. With following configuration.

LOGIN_REQUIRED: "True"
REMOTE_AUTH_BACKEND: "social_core.backends.keycloak.KeycloakOAuth2"
SOCIAL_AUTH_KEYCLOAK_PUBLIC_KEY: "MIIBIjANBgkqhkiG9w0BA..."
SOCIAL_AUTH_KEYCLOAK_KEY: "netbox"
SOCIAL_AUTH_KEYCLOAK_AUTHORIZATION_URL: "https://keycloak.../auth/realms/DEV/protocol/openid-connect/auth"
SOCIAL_AUTH_KEYCLOAK_ACCESS_TOKEN_URL: "https://keycloak.../auth/realms/DEV/protocol/openid-connect/token"
SOCIAL_AUTH_KEYCLOAK_SECRET: "xxx"

Expected Behavior

Successfully authenticated user.

Observed Behavior

The version 3.3.5 is working fine but version 3.3.6 is ending with following error. It is broken only for new users when the user already exists in the local database there is no error and everything is working.

netbox log

Internal Server Error: /oauth/complete/keycloak/

[mochipon]

This issue is critical for me and 100% reproducible.

As per the contributing guide, I need to wait for the issue to be accepted and assigned to someone, but here is a tiny patch to fix the issue 2c0d188

[kkthxbye-code]

@arthanson - Could you have a look at this. Caused by: #10549