Add an event if a user is archived

This adds a new type of event, 'archive_user', which stores the id of
the archived user and the id of the user who is doing the archiving.

app/main/views/find_users.py

@@ -1,7 +1,8 @@
 from flask import flash, redirect, render_template, request, url_for
-from flask_login import login_required
+from flask_login import current_user, login_required
 
 from app import user_api_client
+from app.event_handlers import create_archive_user_event
 from app.main import main
 from app.main.forms import SearchUsersByEmailForm
 from app.models.user import User
@@ -45,6 +46,8 @@ def user_information(user_id):
 def archive_user(user_id):
     if request.method == 'POST':
         user_api_client.archive_user(user_id)
+        create_archive_user_event(str(user_id), current_user.id)
+
         return redirect(url_for('.user_information', user_id=user_id))
     else:
         flash('There\'s no way to reverse this! Are you sure you want to archive this user?', 'delete')