Update invited user form so it works if user inputs empty team name

Closes SCI-650

app/controllers/users/invitations_controller.rb

@@ -1,30 +1,44 @@
-class Users::InvitationsController < Devise::InvitationsController
+module Users
+  class InvitationsController < Devise::InvitationsController
+    def update
+      # Instantialize a new organization with the provided name
+      @org = Organization.new
+      @org.name = params[:organization][:name]
 
-  def update
-    @org = Organization.new
-    @org.name = params[:organization][:name]
+      super do |user|
+        if user.errors.empty?
+          @org.created_by = user
+          @org.save
 
-    super do |user|
-      if user.errors.empty?
-        @org.created_by = user
-        @org.save
-
-        UserOrganization.create(
-          user: user,
-          organization: @org,
-          role: 'admin'
-        )
+          UserOrganization.create(
+            user: user,
+            organization: @org,
+            role: 'admin'
+          )
+        end
       end
     end
-  end
 
-  def accept_resource
-    resource = super
+    def accept_resource
+      unless @org.valid?
+        # Find the user being invited
+        resource = User.find_by_invitation_token(
+          update_resource_params[:invitation_token],
+          false
+        )
 
-    if not @org.valid?
-      resource.errors.add(:base, @org.errors.to_a.first)
+        # Check if user's data (passwords etc.) is valid
+        resource.assign_attributes(
+          update_resource_params.except(:invitation_token)
+        )
+        resource.valid? # Call validation to generate errors
+
+        # In any case, add the organization name error
+        resource.errors.add(:base, @org.errors.to_a.first)
+        return resource
+      end
+
+      super
     end
-
-    resource
   end
 end