This PR includes many fixes and refactors for oauth2 authentication and
login endpoints, ie:
- Invalid login returns `403` instead of `500` error
- Removed the session token from console/operator `user credentials
login`, `oauth flow login` and `change-password` api responses
- Removed session token from localStorage
- Added styles for oauth_callback page and display more descriptive
errors for debugging
- Success logins returns `204` instead of `200`
- Removed unused swagger apis and code from both, operator and console
projects
- Operator `Oauth2` login flow was not validating anything, now it does
Signed-off-by: Lenin Alevski <alevsk.8772@gmail.com>
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