Sonarqube account creation process

i have sonarlcoud account already

can I same credentials to use sonarqube?
is there any seperate process to create sonarqube account for personal use?

what is the difference between sonarcloud and sonarqube , i see both are using for azure devops cloud. then what is the difference

Hey there.

This blog should help: SonarCloud or SonarQube, What's Right for Your Team?

Specifically responding to the question fo authentication: you should consider these are completely separate worlds. The SaaS service (SonarCloud) doesn’t know anything about a SonarQube server you’ve started up somewhere, and vice-versa.