Remove sign up page and update button styles

common/models/user.js

@@ -323,6 +323,38 @@ module.exports = function(User) {
     return ctx.res.redirect(redirect);
   });
 
+  User.beforeRemote('create', function({ req, res }, _, next) {
+    req.body.username = 'fcc' + uuid.v4().slice(0, 8);
+    if (!req.body.email) {
+      return next();
+    }
+    if (!isEmail(req.body.email)) {
+      return next(new Error('Email format is not valid'));
+    }
+    return User.doesExist(null, req.body.email)
+      .then(exists => {
+        if (!exists) {
+          return next();
+        }
+
+        req.flash('error', {
+          msg: dedent`
+      The ${req.body.email} email address is already associated with an account.
+      Try signing in with it here instead.
+          `
+        });
+
+        return res.redirect('/email-signin');
+      })
+      .catch(err => {
+        console.error(err);
+        req.flash('error', {
+          msg: 'Oops, something went wrong, please try again later'
+        });
+        return res.redirect('/email-signin');
+      });
+  });
+
   User.on('resetPasswordRequest', function(info) {
     if (!isEmail(info.email)) {
       console.error(createEmailError());