You can access your Chalk&Wire account after Blackboard access has ended by logging into Chalk&Wire directly.
Go to https://ep.chalkandwire.com/ep2_cune/login.aspx?cus=378 and enter your cune.org e-mail address and Chalk&Wire password.
If you don't remember your Chalk&Wire password, click the "Forgot my password" link and an e-mail will be sent to your cune.org account for resetting it.
Alternatively, submit an incident ticket at helpdesk.cune.edu asking that your password be reset.