'How to unlock Oracle apex cloud workspace account?

I was using Oracle apex cloud account on https://apex.oracle.com/pls/apex

Unfortunately my workspace account got locked. As I don't know the password of admin user of the workspace given by Oracle that's why I am unable to unlock my account is there any way to unlock that account? I tried to reset the password but that was of no use because it continuously giving message that the account is locked.

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Solution 1:[1]

If you scroll down on that page and click "Who do I contact for help?", it says for locked accounts you should email [email protected]

Solution 2:[2]

Do you have access to database and the box it runs on? When I first provisioned Oracle Integration Cloud I had no knowledge of the password for the internal workspaces admin account. I simply ran

SQLPLUS /NOLOG 
SQL> CONNECT SYS AS SYSDBA 
SQL> @APXCHPWD

It will let you set a new password for the admin account on the internal workspace, at which point you can reset your password for this particular user in this particular workspace

Solution 3:[3]

You must go on Oracle Cloud > Database Actions > Database Users There you will see your account locked (orange), click on Edit Your account seems not locked there => click to lock :-) => Apply Click Edit again and unlock the account + Apply => it turn to green (unlocked)

Sources

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Source: Stack Overflow

Solution Source
Solution 1 kfinity
Solution 2 Chris Maggiulli
Solution 3 Hugues