To change the login credentials
Select the desired Oracle database schema.
On the Schema menu, click Change Login Credentials.
The Change Login Credentials dialog box appears.
Note: You can only change the Password. You cannot change the Login User. This is to retain the access privileges to the schemas that are already loaded in the repository. A different login user might not have the privileges that are required to access these schemas.
Enter the appropriate password.
Click OK.
The login credentials are changed.