On the email confirmation code screen there is a link to "Resend Code" which will trigger a new email being sent to you.
If you have already left that page, you can sign back in with your email address and the password you set and it will take you back here.
The email you should be receiving comes from no-reply@foundationsource.com and has the Subject line, "Foundation Source GivingHub - verification code" Please make sure to check your spam folder as well.
If you are still having trouble receiving or locating the email, you may want to whitelist the foundationsource.com domain in your email settings or server.
Please submit a support request if you still are experiencing problems.