Descriptive error if user by mail not found.

closes #3537
- Replaced generic NotFound error with descriptive NotFoundError.

core/server/api/authentication.js

@@ -65,11 +65,6 @@ authentication = {
             }).then(function () {
                 return when.resolve({passwordreset: [{message: 'Check your email for further instructions.'}]});
             }).otherwise(function (error) {
-                // TODO: This is kind of sketchy, depends on magic string error.message from Bookshelf.
-                if (error && error.message === 'NotFound') {
-                    error = new errors.UnauthorizedError('Invalid email address');
-                }
-
                 return when.reject(error);
             });
         });

core/server/models/user.js

@@ -631,7 +631,7 @@ User = ghostBookshelf.Model.extend({
     generateResetToken: function (email, expires, dbHash) {
         return this.getByEmail(email).then(function (foundUser) {
             if (!foundUser) {
-                return when.reject(new Error('NotFound'));
+                return when.reject(new errors.NotFoundError('There is no user with that email address.'));
             }
 
             var hash = crypto.createHash('sha256'),