Initial commit

db/migrate/20210120135842_add_username_to_members.rb

@@ -0,0 +1,6 @@
+class AddUsernameToMembers < ActiveRecord::Migration[5.2]
+  def change
+    add_column :members, :username, :string, null: true
+    add_index :members, :username, unique: true, where: 'username IS NOT NULL'
+  end
+end