SAP EP Login with email id attribute

Hi,

We have SAP EP 7.01 implemented in our solution deployment.

We are currently using userid and password to loginto the SAP EP.

Can anybody tell me whether we can user emailid attribute of a user with password to login instead of userid and password?

Does SAP EP supports this implementation solution, if so can you please brief about the changes to be done.

Thanks,

Naveen.