During the Identity Manager installation when the management console secure flag is set to true no user is saved in the IM_AUTH_USER table.
All Identity Manager
The below instructions discuss modifying your database directly. We strongly recommend you have a backup and discuss these changes with your database administrator.
You can manually add the user into the IM_AUTH_USER table by running an insert statement. Below is an example of a statement you may run:
INSERT INTO [dbo].[IM_AUTH_USER]
([USER_NAME]
,[PASSWORD]
,[DISABLED]
,[ID])
VALUES ('NewUser','{PBES}Password','0','0')
GO
Where the items in bold you will have to add your user and your encrypted password. To encrypt the password please follow the below link:
The Password Tool