refactor and fixes

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_08_15_190540) do
+ActiveRecord::Schema[7.0].define(version: 2023_08_19_113427) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -140,8 +140,8 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_15_190540) do
   end
 
   create_table "users", force: :cascade do |t|
-    t.string "first_name", null: false
-    t.string "last_name", null: false
+    t.string "first_name"
+    t.string "last_name"
     t.string "email", null: false
     t.string "role", null: false
     t.string "encrypted_password", null: false