GET /api/allusers
GET /api/userbyemail/:email
GET /api/userbyid/:_id
POST /api/signup
POST /api/login
PUT /api/updateuser
DELETE /api/deleteuser GET /api/allproducts
GET /api/productbycategory/:category
GET /api/productbyid/:_id
GET /api/productbybrand/:brand
POST /api/addproduct
PUT /api/updateproduct
DELETE /api/deleteproductGET /api/allbrands
GET /api/brandbyid/:_id
POST /api/addbrand
PUT /api/updatebrand
DELETE /api/deletebrand