Mobile app initial implementation.

Closes #3 (closed)

lib/screens/home.dart

@@ -17,13 +17,6 @@ class Home extends StatefulWidget {
   _HomeState createState() => _HomeState();
 }
 
-String clientId = "222222";
-String clientSecret = "22222222";
-
-String redirectURL = "app://com.vereign.app/oauth2";
-String authEndpoint = "$APP_HOST/api/oauth2/authorize";
-String tokenEndpoint = "$APP_HOST/api/oauth2/token";
-
 class _HomeState extends State<Home> {
   @override
   initState() {
@@ -90,13 +83,13 @@ class _HomeState extends State<Home> {
   startOAuth() {
     FlutterAppAuthWrapper.startAuth(
       AuthConfig(
-        clientId: clientId,
-        clientSecret: clientSecret,
-        redirectUrl: redirectURL,
+        clientId: CLIENT_ID,
+        clientSecret: CLIENT_SECRET,
+        redirectUrl: REDIRECT_URL,
         state: "login",
         prompt: "consent",
         endpoint: AuthEndpoint(
-            auth: authEndpoint, token: tokenEndpoint),
+            auth: AUTH_ENDPOINT, token: TOKEN_ENDPOINT),
         scopes: [
           "user_account_status",
           "user_territory",