Email address verification sevice

[huodahaha]

As a product owner
I need to verify a customer's email
So that I can make connect with a customer with email

Assumptions:

• using a verification code to verify an email address's correctness and store the result to model

Acceptance Criteria:

Given a customer with email address infomation
When a customer issue a verification request 
he will receive an email with verification code
Then he can use the code as input to get himself verified.