Create user update page
Add update action in user controller; only works for invalid credentials currently.
Complete user update
Restrict access to user update and edit actions to signed in users.
Restrict access to user update and edit actions to correct users.
Forward users onto desired pages after requiring login.
Create users index page; restrict access to signed in users.
Add pagination to users#index
Refactor pagination code
Add admin attribute to users
Add destroy to users
Test for preventing patch to change user to admin.
Add tests for ensuring links are not present when users not signed in
Add partial for user fields; add tests to prevent user from creating a new user while signed in.
Prevent admin from deleting themself