^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$
POST /api/v1/register
POST /api/v1/login
GET /api/v1/auth/:id
PUT /api/v1/auth/:id
DELETE /api/v1/auth/:id
GET /api/v1/books
POST /api/v1/books
GET /api/v1/books/:id
PUT /api/v1/books/:id
DELETE /api/v1/books/:id
[ ]: # Language: markdown [ ]: # Path: README.md