Sends a sign-in with email link to the given address.
actionCodeSettings is required in the modular API (matching firebase-js-sdk). The namespaced firebase.auth().sendSignInLinkToEmail(email, settings?) API still supplies defaults when settings are omitted.
actionCodeSettings
firebase.auth().sendSignInLinkToEmail(email, settings?)
Sends a sign-in with email link to the given address.