Create Volunteer Routes: Volunteer login, logout, signup

[anirvinv]

Volunteer signup:

• Creates an account for the volunteer and waits for admin to verify their account

Volunteer Login:

• Sets auth cookie

Volunteer logout:

• Deletes token in cookie

[tejpshah]

Pretty much done. Check authozero branch.

Couldn't figure out how to implement this test functionality if @VanshSharma14 can do this - implemented most other tests though