Improve surface detection and position of item

mobile/src/Auth/Login.js

@@ -19,6 +19,7 @@ import KeyboardSpacer from "react-native-keyboard-spacer"
 import { versionInfo } from "../version"
 import autobind from "autobind-decorator"
 import { isIphoneX } from "react-native-iphone-x-helper"
+import { defaultUser } from "../development"
 
 export class Login extends React.Component {
   static bindings = {
@@ -75,7 +76,7 @@ export class Login extends React.Component {
   constructor(props) {
     super(props)
     this.state = {
-      binder: new FormBinder({ email: "john@lyon-smith.org" }, Login.bindings),
+      binder: new FormBinder({ email: defaultUser }, Login.bindings),
       messageModal: null,
       apiModal: null,
     }