KDE Plasma 5 - Keboard shortcut

Many times, while working online, we are prompted to enter our email address.

Will be nice, If I could create a shortcut, say something like CTRL+Shift+$ sign, that can retrieve a previously created item with my enmail address, and insert it into the current prompted input field.

Any idea? I checked in the KDE setup under Hardware->Keyboard, but....

Thanks
Alex