Issue with Metamask authentication When Manually Deleting Users

[gianksp]

When trying to sign in from metamask (I started recently having an issue). When I sign in with metamask email is stored as empty for the user.

Error logs

2021-06-05T08:02:56.123Z - Error: Account already exists for this email address.
    at /moralis-server/lib/RestWrite.js:1442:17
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)

Server Url

https://svzayzygttuw.moralis.io:2053/server

I can also see this error in the console when in the Moralis dashboard

Access to XMLHttpRequest at 'https://svzayzygttuw.moralis.io:2053/server/schemas' 
from origin 'https://svzayzygttuw.moralis.io:2083' has been blocked by 
CORS policy: No 'Access-Control-Allow-Origin' header is present on 
the requested resource.

[ivan]

You are trying to register a new user or this is when you try to login to an existing user?

[gianksp]

Even with my User collection empty this happens. Even where there is an error it will create a user in the collection.

If I try to “authenticate” (from react-moralis authenticate function) it will keep throwing error, in the UI the user will still be isAuthenticated = false but I will have more “User” records in the collection

[ivan]

try with new server and tell us if it works
react-moralis is not really production ready, please let us know also if vanilla JS works or not

[gianksp]

I managed to replicate the issue.

If you manually delete a “User” and don’t delete the user data in "Session, “EthBalance”, “_EthAddress” it will fail the next time you try to sign in.

You need to do full cleanup of user data.

Ideally to fix the issue there would be a built in “cascade” mechanism when deleting users.

[ivan]

okok perfect thanks for investingating, we will fix this

[ivan]

@gianksp do all users stop working or only the specific user you manually remove?

[gianksp]

Seems to be contained for the user deleted only.

[ivan]

ah okok
in that case I don’t think we will do anything at this moment
instead of manually deleting a developer can delete via code and then afterDelete trigger will fire where developer can script delete logic

Maybe in the future we will find a better solution, for now we will just add to docs to delete Session and EthAddress if deleting manually

[gianksp]

Great! I also think a good solution requires a bit of thought first and is not a blocker for the success of the platform. It will be enough with this topic resolved for future references.

[mayjer]

Added a note the Crypto Login docs about manually deleting users

https://docs.moralis.io/moralis-sdk/crypto-login#manually-deleting-users

[CryptoTabaluga]

Thanks a lot ! I ran into the same issue and your solution worked for me too! It took me quite a while though to find your post