Fix For issue #541

[Aditya31398]

Issue #541
Added Check admin user exists before creating new admin user

[welcome]

Thanks so much for opening this pull request and for helping to improve SirixDB 🚀

[JohannesLichtenberger]

I think the user is not created anymore (downloaded and checked the log):

2022-11-05T14:14:08.6137375Z     14:14:08.594 [vert.x-eventloop-thread-1] TRACE io.vertx.ext.web.RoutingContext - Calling the  handler
2022-11-05T14:14:08.6137830Z 
2022-11-05T14:14:08.6138140Z Integration test > Testing a simple query to get the node-key of a node STANDARD_ERROR
2022-11-05T14:14:08.6138852Z     Exception in thread "vert.x-eventloop-thread-1 @coroutine#11" io.vertx.core.impl.NoStackTraceThrowable: invalid_grant: Invalid user credentials

[JohannesLichtenberger]

Would be awesome if you can fix this -- thanks so far for your effort :)

[JohannesLichtenberger]

@Aditya31398 still the same error, sadly

[Aditya31398]

When I try locally the kcadm.sh command gives out error connection refused. This is the problem. I'll try to fix it

[Aminmalek]

I had this issue just one time I think Its related to how docker save the credentials and why It just happen one time, I think you need to check the ENVs another time it seems both docker and the keycloak script attempts to save the user and they have conflicts with each other.