added new api endpoints:

1. /api/v1/projects/:projectID/users (GET)
   get users list of a particular project by passing it project id

2. /api/v1/projects/:projectID/users (POST)
   instead of user registering in the site. in this the project owner can create user credential and give to them

3./api/v1/projects/:projectID/users/:userID (PUT)
by passing mail and name it can be modified for a paritcular userid

4./api/v1/projects/:projectID/users/:userID/password
the project admin can change the user password

1. /api/v1/projects/:projectID/users/:userID
   the project admin can delete the user of a particular project

using this endpoints the user can manage the users data flexibly.

next to add a page for managing this endpoints