Add count number of data from the table

[j4l13n]

What does this PR do?

• get all users and the length of Articles, Reported, Notifications and Users numbers.

Description of Task to be completed?

• Admin should be able to see all users and the count number of tables

How should this be manually tested?

• First clone it to your machine:

https://github.com/andela/ah-lobos-backend.git

• Open it using your favorite IDE, I recommend (vs code)

• Install all necessary node modules

npm install

• Run

npm run dev

• Use Postman to test out the following endpoints

API ENDPOINTS

API	Methods	Description
/api/admin/users	GET	Get all users

You should see an image avatar on your profile if you didn't set it

Any background context you want to provide?

• Create .env file with the help of example.env

What are the relevant pivotal tracker stories?

• N/A

Screenshots

• N/A

Questions

• N/A