Remove Account Definitions
To remove a Composer account definition:
Log into Composer as a supervisor of the account.
Select to access the supervisor menu and then select Accounts.
The Manage Accounts page appears. It lists the accounts that have been defined.
In the list of accounts, locate the account you want to delete and select the in the Delete column.
A warning dialog appears that prompts you to confirm that you want to delete the account.
Select on the warning dialog to remove the account definition. All user definitions, data source configurations, data source connections, and custom dashboards that are not associated with other Composer accounts are removed.