Just the blockers now!!

app/controllers/credentials_controller.rb

@@ -24,12 +24,13 @@ class CredentialsController < ApplicationController
   def create
     @credential = Credential.new(credential_params)
     @credential.domain_id = @domain.id
-
+    @credential.email << "@" << @domain.domain
     respond_to do |format|
       if @credential.save
         format.html { redirect_to domain_path(@domain), notice: "Credential was successfully created." }
         format.json { render :show, status: :created, location: @credential }
       else
+        @credential.email.sub! ("@" + @domain.domain), ""
         format.html { render :new, status: :unprocessable_entity }
         format.json { render json: @credential.errors, status: :unprocessable_entity }
       end