For Collector users with multiple accounts, you can sign onto the Collector module once and then select one of your accounts and log into the Home page for that account.
To sign in using Single Sign-on:
After completing the tasks for the current account, you do not need to sign out of the Collector module. At the top of every page of the Collector module is the Account Selection drop-down list box with a list of all the accounts.
To access a new account:
From the Account Selection drop-down list box at the top of each page, select another account.
You are brought to a new Welcome page for the account you selected.