for oauth authentication, go to route localhost:5050/signInWithGoogle
GMAIL CONTACTS
3. got to route localhost:5050/contacts for all gmail contacts
GMAIL SEND MAIL
4. to send email, go to gmailController and manually fill in to/from/message fields in sendSampleEmail,(will automate this with function parameters later)
5. go to route to send mail localhost:5050/sendSampleMail