Red:  SignUpConstructor#response returns a SignUp instance
Create SignUpConstructor class
Add respnse method to SignUp class

- move signup contructor file to correct directory
- fix typo in signup constructor test

----FAILING TEST-----

1) SignUpConstructor#response returns a SignUp instance
   Failure/Error: expect(response).to be_instance_of(SignUp)
     expected nil to be an instance of SignUp(id: integer, email: string, created_at: datetime, updated_at: datetime, uuid: uuid)
Green:  SignUpConstructor#response returns a SignUp instance
Write failing test => Version5UuidSetter sets SomeObject#uuid to Version 5 UUID
Create Version5UuidSetter class
Add initialize method to Version5UuidSetter class
Make test pass => Version5UuidSetter sets SomeObject#uuid to Version 5 UUID
Refactor test for Version5UuidSetter#uuid
Write failing test => Version5UuidSetter#object returns an object with a Version 5 UUID

-----FAILING TEST-----

2) Version5UuidSetter#object returns an object with a Version 5 UUID
   Failure/Error: uuid   = object.uuid
   NoMethodError:
     undefined method `uuid' for nil:NilClass
Make test pass => Version5UuidSetter#object returns an object with a Version 5 UUID