this is expense tracker api ends consisting of various api endpoints
authentication
/api/signup
then go to email and verify by clicking on the link
/api/auth
to get the auth token for authentication
expenses
/api/expense
-get request to list all the expenses for a user and
-post request for adding one
/api/analyze/totalPerMonth given a month and year it will return the expense in a month with details
/api/analyze/totalPerYear it will return the monthwise expenses for last 12 months
/api/analyze/lastWeek gives u detailed expences of last week