#166075761 Separate parameter validation from route logic

[chidimo]

What does this PR do?

Separate parameter validation from route logic

Description of Task to be completed?

Move paramter validators into separate helper file.

How should this be manually tested?

1. Clone the repo
2. cd into the root folder on a cmd shell and run yarn install. PowerShell is fine also.
3. Setup a PostgreSQL DB.
4. Define a .env file in the root of the project and supply values for the following parameters

   JWT_SECRET=<json-web-token-secret>
   PGPASSWORD=<postgres-db-password>
   PGHOST=<postgres-db-host>
   PGUSER=<postgres-db-user>
   PGPORT=<postgres-db-port>

5. Create a PostgreSQL database called testdb and run the following command on it with pgadmin

CREATE TABLE users (
	id SERIAL PRIMARY KEY,
	email VARCHAR NOT NULL UNIQUE,
    password VARCHAR NOT NULL,
    firstname VARCHAR DEFAULT '',
    lastname VARCHAR DEFAULT '',
    phone VARCHAR DEFAULT '',
    address jsonb DEFAULT '{"home": "", "office": ""}',
    status VARCHAR DEFAULT 'unverified',
    isAdmin BOOLEAN DEFAULT false
);

1. Now run command yarn test

Any background context you want to provide?

Be sure to setup the database as instructed above

What are the relevant pivotal tracker stories?

166075761

Screenshots (if appropriate)

Nil

Questions:

Nil