sandbox rofile alignment

Frontend/lib/mih_packages/authentication/signin.dart

@@ -585,7 +585,8 @@ class _SignInState extends State<SignIn> {
                               ),
                             ),
                             const SizedBox(height: 10),
-                            Visibility(
+                            Center(
+                              child: Visibility(
                                 visible: showProfiles,
                                 child: SizedBox(
                                   width: 500,
@@ -610,7 +611,8 @@ class _SignInState extends State<SignIn> {
                                         "NB: These accounts are used for test purposes. Please do not store personal information on these profiles.",
                                         textAlign: TextAlign.center,
                                         style: TextStyle(
-                                        color: MzanziInnovationHub.of(context)!
+                                          color:
+                                              MzanziInnovationHub.of(context)!
                                                   .theme
                                                   .secondaryColor(),
                                           fontSize: 15.0,
@@ -621,6 +623,7 @@ class _SignInState extends State<SignIn> {
                                   ),
                                 ),
                               ),
+                            ),
                           ],
                         ),
                       ],