Use new org membership table to load users

[rowanseymour]

No description provided.

[codecov]

Codecov Report

Merging #636 (d1c0fac) into main (a009c4e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #636   +/-   ##
=======================================
  Coverage   61.93%   61.93%           
=======================================
  Files         132      132           
  Lines       12918    12918           
=======================================
  Hits         8001     8001           
  Misses       4051     4051           
  Partials      866      866           

Impacted Files	Coverage Δ
core/models/users.go	85.71% <ø> (ø)

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