On-Boarding Flow backend Implementation

[aman-pawar96]

Apis to be implemented:

1. /user/sentOTP : will be used for sending OTP for new users
2. /user/verifyOTP : will be used for verifying the OTP
3. /user/setPassword : will be used to create Password for user login (storing as password hash using bycrypt)
4. /user/login : number and Password based login that will return the JWT token
5. /user/me : verify the validity of the Token
6. /user/updateDetails: will be used for updating profile details such as Name, email, college etc