Lookup for email in username field to match docs if email is undefined (#2732)

* Lookup for email in username field to match docs if email is undefined

* Adds support for sendMail option to when email is selected

* Proper does not exists clause

spec/MockEmailAdapterWithOptions.js

@@ -2,9 +2,20 @@ module.exports = options => {
 	if (!options) {
 		throw "Options were not provided"
 	}
-	return {
+	let adapter = {
 		sendVerificationEmail: () => Promise.resolve(),
     sendPasswordResetEmail: () => Promise.resolve(),
     sendMail: () => Promise.resolve()
+	};
+	if (options.sendMail) {
+		adapter.sendMail = options.sendMail
 	}
+	if (options.sendPasswordResetEmail) {
+		adapter.sendPasswordResetEmail = options.sendPasswordResetEmail
+	}
+	if (options.sendVerificationEmail) {
+		adapter.sendVerificationEmail = options.sendVerificationEmail;
+	}
+
+	return adapter;
 }