Allow renewing and adding new users by number of terms #75

In the CEO API, currently you have to specify exactly what terms to add in /<username>/renew and /members/.

It would be better, if there was an extra option (similar to the GUI), where in addition to "terms" and "non_member_terms", there also is "number_of_terms" and possibly "number_of_non_member" terms. These options would be integers and would renew/create member for that many number of terms.

It should be straightforward, since get_terms_for_new_user, get_terms_for_renewal already exist in https://git.csclub.uwaterloo.ca/public/pyceo/src/branch/master/ceo/term_utils.py#L11, and the API would have to modified here to use them https://git.csclub.uwaterloo.ca/public/pyceo/src/branch/master/ceod/api/members.py

Say if a user has terms

f2020
w2021

and current term is f2022

should adding 1 term add w2023 or s2021?

behaviuor of get_terms_for_renewal would be w2023 so I'll make it do that.

side note: get_terms_for_renewal function is written for client so is not suitable for server side use

behaviuor of get_terms_for_renewal would be w2023 so I'll make it do that.

No, it would be f2022. See https://git.csclub.uwaterloo.ca/public/pyceo/src/branch/master/ceo/term_utils.py#L35.

@r345liu thanks for taking this.

@snedadah can you confirm this removes one of the blockers on the membership webpage?

@r389li, Yep, once this is deployed, it will remove that blocker for the membership webpage.

Great! @r345liu can you package and deploy it?